OPINION
ONION, Presiding Judge.This is an appeal from a conviction for possession of heroin where the punishment was assessed by a jury at 35 years.
There is no challenge to the sufficiency of the evidence. Austin police officers, armed with a search warrant, went to a trailer house belonging to a Dudley Bryant at 2 p. m. on July 11, 1969. Bryant, the appellant Polanco and a known addict Keto Wilson were found in the front room of the house. A search uncovered heroin and Bryant and the appellant were charged with the possession of such narcotics.
At the outset appellant contends the court erred in admitting into evidence heroin seized under a search warrant which was based on an affidavit which did not reflect probable cause in violation of the Fourth and Fourteenth Amendments to the United States Constitution. See also Article I, Sec. 9, Texas Constitution, Vernon’s Ann.St.
The affidavit, omitting the formal parts, reads:
“Before me, the undersigned authority, on this day personally appeared the undersigned affiants, who being by me severally sworn, upon their oaths state, that: A certain building, house and place, occupied and used as a private residence, located in Austin, Travis County, Texas, described as a yellow and silver trailer with a small grove of banana trees growing across the front of the trailer. The trailer is designated as 23A located in Pecan Grove Trailer Park, 1518 Barton Springs Road, Austin, Travis County, Texas and being the building, house or place of DUDLEY BRYANT, WM dob 5-23-28, APD #8191 and other person or persons unknown to affiants by name, identity or description is a place where we each have reason to believe and do believe that said party so occupying and using, as a private residence, the said building, *765house and place has in his possession therein narcotic drugs, as that term is defined by law, and contrary to the provisions of law, and for the purpose of the unlawful sale thereof, and where such narcotic drugs are unlawfully sold; that on or about the 11th day of July, A.D., 1969, Affiants have received information from a reliable and credible informant that DUDLEY BRYANT, WM dob 5-23-28, APD#8191, is keeping and selling narcotics to-wit HEROIN in his residence at 23A Pecan Grove Trailer Park, 1518 Barton Springs Road, Austin, Travis County, Texas. The informant further states that people are going up to the trailer house belonging to DUDLEY BRYANT, going inside or calling them outside and then they go over to the ball park located in the 1500 block of Toom-ey Road and exchange objects. Based on these observations, a surveillance was maintained on DUDLEY BRYANT’S trailer from July 9, 1969 through July 10, 1969 and numerous people known to be drug addicts and pushers go to BRYANT’S trailer, stay a few seconds and then go into the ball park, and an object believed to be HEROIN was exchanged for money and then the customer would leave. Based also on our observations, DUDLEY BRYANT is keeping his narcotics in a small utility shed belonging to his trailer space and inside the trailer too.”
In determining the sufficiency of the affidavit we are bound by the four corners thereof. Art. I, Sec. 9, Tex. Const.; Article 18.01, Vernon’s Ann.C.C. P.; Nicol v. State, Tex.Cr.App., 470 S.W.2d 893; Gaston v. State, Tex.Cr.App., 440 S.W.2d 297 (concurring opinion), cert. den. 396 U.S. 969, 90 S.Ct. 452, 24 L.Ed.2d 435; Ruiz v. State, Tex.Cr.App., 457 S.W.2d 894 (concurring opinion); Hall v. State, Tex.Cr.App., 394 S.W.2d 659; McLennan v. State, 109 Tex.Cr.R. 83, 3 S.W.2d 447, 448.
A search warrant affidavit may be based entirely on hearsay information and need not reflect the direct personal observations of the affidavit so long as there is a substantial basis for crediting the hearsay. See Jones v. United States, 362 U.S. 257, 80 S.Ct. 725, 4 L.Ed.2d 697, 78 A.L.R.2d 233. Aguilar v. Texas, 378 U.S. 108, 84 S.Ct. 1509, 12 L.Ed.2d 723, made clear, however, that in such cases, “the magistrate must be informed of some of the underlying circumstances from which the informant concluded that the narcotics were where he claimed they were, and some of the underlying circumstances from which the officer concluded that the informant, whose identity need not be disclosed, see Rugendorf v. United States, 376 U.S. 528, 84 S.Ct. 825, 11 L.Ed.2d 887, was ‘credible’ or his information ‘reliable.’ ”
In Spinelli v. United States, 393 U.S. 410, 89 S.Ct. 584, 21 L.Ed.2d 637, the rule was referred to as “Aguilar two prong test.” And in 53 California Law Review 840, it was said:
“The Aguilar synthesis combined the requirement that the informer be reliable with the requirement that he have an adequate basis for his allegations, emphasizing the need for ‘underlying circumstances’ in support of each element.” at p. 844.
Applying these principles we first consider the weight to be given the informer’s tip when it is considered apart from the rest of the affidavit. The affiants swore their informant was “reliable and credible” and offered the magistrate no reason in support of such conclusion. It is thus clear that the second prong of Aguilar was not met. Spinelli v. United States, supra. What about the first prong? The af-fiants swore the informant told them Dudley Bryant was keeping and selling heroin at his residence giving the address and further stated “that people were going up to the trailer house belonging to Dudley Bryant, going inside or calling them outside and then they would go over to the ball park located in the 1500 block of Toomey Road and exchange objects.” There was no showing that the informer personally observed the transactions he re*766ported or acquired the information by personal knowledge, nor was there a showing that the informer otherwise based his information reliably. The affidavit fails to explain how the informant came by his information.
If we were dealing with an affidavit which contained hearsay alone, it would he insufficient to satisfy the Aguilar test.
In addition to the hearsay, there are other facts set forth obtained from a police surveillance.
In Acosta v. State, Tex.Cr.App., 403 S.W.2d 434, the hearsay set forth in the affidavit failed to satisfy one prong of the Aguilar test, but as a result of a surveillance set up áfter the receipt of the tip the affiants observed several persons known to be narcotic users enter the house in question, remain approximately five minutes and leave. These observations were also set forth in the affidavit with the informer’s tip. Taken together, this court upheld the validity of the search warrant based upon such affidavit. Similar affidavits have been upheld in other cases. Gonzales v. State, 410 S.W.2d 435, cert. den. 387 U.S. 925; Bosley v. State, Tex.Cr.App., 414 S.W.2d 468; Aguilar v. State, Tex.Cr.App., 444 S.W.2d 935; Brown v. State, 437 S.W.2d 828, cert. den. 393 U.S. 1089, 89 S.Ct. 850, 21 L.Ed.2d 782; O’Quinn v. State, Tex.Cr.App., 462 S.W.2d 583; Gonzales v. Beto, Acosta v. Beto, 5 Cir., 425 F.2d 963.
And in Spinelli v. United States, supra, and Gonzales v. Beto, supra, it was held that corroborating facts from police observation could make an affidavit valid even if the hearsay contained therein was not sufficient to meet both prongs of Aguilar.
In Spinelli, Mr. Justice Harlan wrote:
“The informer’s report must first be measured against Aguilar’s standards so that its probative value can be assessed. If the tip is found inadequate under Aguilar, the other allegations which cor-robórate the information contained in the hearsay report should then be considered. At this stage as well, however, the standards enunciated in Aguilar must inform the magistrate’s decision. He must ask: Can it fairly be said that the tip, even when certain parts of it have been corroborated by independent sources, is as trustworthy as a tip which would pass Aguilar’s tests without independent corroboration? Aguilar is relevant at this stage of the inquiry as well because the tests it establishes were designed to implement the longstanding principle that probable cause must be determined by a ‘neutral and detached magistrate,’ and not by ‘the officer engaged in the often competitive enterprise of ferreting out crime.’ Johnson v. United States, 333 U.S. 10, 14, 68 S.Ct. 367, 369, 92 L.Ed. 436 (1948). A magistrate cannot be said to have properly discharged his constitutional duty if he relies on an informer’s tip which — even when partially corroborated — is not as reliable as one which passes Aguilar’s requirements when standing alone.”
In Gonzales v. Beto, supra, the court states that:
“ * * * an informer’s tip can be significantly buttressed if either (1) independent observations by the affiant corroborate sufficient details of the tip (whether suspicious or not) to negate the possibility that the informer ‘fabricat[ed] his report out of the whole cloth’ (the Draper situation),1 or (2) independent observations by the affiant contribute to a showing of probable cause by revealing not merely normal patterns of activity but activity that reasonably arouses suspicion (the McCray situation).2 We consider the Spinelli case to mean that either of these buttressing observations may allow the magistrate to resolve the required comparison with Aguilar in favor of issuing the search warrant.”
*767We conclude the independent buttressing observations sufficient to satisfy the requirements of probable cause. The surveillance showed that people were going to the trailer house in question, staying a few seconds then going to the nearby ball park and exchanging objects just as the informer had reported. Putting aside whether these acts were suspicious in and of themselves, it is clear that the informer’s report was not fabricated out of the whole cloth. Further, the people approaching the trailer house were known to the affiants who conducted the surveillance as narcotics addicts and pushers who would stay a few seconds — facts somewhat similar to those in Acosta. Still further, there was activity that reasonably aroused suspicion, particularly in light of the informer tip (that the appellant was keeping and selling narcotics). Addicts and pushers were observed going to a ball park where money was being exchanged for an object. While the affidavit is no model and it was not drafted as well as it might have been, we believe our construction is a common sense and realistic reading of the affidavit. See United States v. Ventresca, 380 U.S. 102, 108, 85 S.Ct. 741, 13 L.Ed.2d 684.
Appellant’s first ground of error is overruled.
Next he contends the court erred in refusing to charge the jury “upon request” on the law of circumstantial evidence. Like the State, we have searched the record and fail to find where such charge was requested. Under any circumstances there is no written objection to the court nor special requested charge in the record in accordance with Articles 36.14 and 36.15, V.A.C.C.P. Hart v. State, 455 S.W.2d 237 (Tex.Cr.App.1970); Baity v. State, 455 S.W.2d 305 (Tex.Cr.App.1970); Ivey v. State, 425 S.W.2d 631 (Tex.Cr.App.1968); Castanuela v. State, 171 Tex.Cr.R. 173, 346 S.W.2d 332 (1961).
Lastly, appellant complains that the indictment should have been quashed because he had been denied his right to an examining trial. He contends an examining trial had been set when an indictment was returned terminating his right to such proceedings, but that such indictment was dismissed and that the instant indictment was returned after the date set by the Justice of the Peace for the examining trial. He urges that, under these circumstances, the court erred in denying his motion to quash the re-indictment. We do not agree. See Harris v. State, Tex.Cr.App., 457 S.W.2d 903 and cases there cited. Brown v. State, Tex.Cr.App., 475 S.W.2d 938.
The judgment is affirmed.
. Draper v. United States, 358 U.S. 307, 79 S.Ct. 329, 3 L.Ed.2d 327 (1959).
. McCray v. Illinois, 386 U.S. 300, 87 S.Ct. 1056, 18 L.Ed.2d 62 (1967).