Prior to May 1, 1873, one Frye contracted with the United States to carry the mail over mail routes, nineteen and one hundred and twenty-one, for the term of four years, ending July 1, 1877. On the day first mentioned, the defendant contracted in writing with Frye to carry the mail oyer the same routes, for the same period; save the latter harmless from his mail contract; pay him eight hundred dollars in four years in equal quarterly payments of fifty dollars each; and was to receive therefor the full compensation allowed by the United States to said Frye.
On December 28, 1875, Frye, in consideration of three hundred and fifty dollars, by his written assignment, transferred and assigned the written contract of the defendant, to the plaintiffs, *373who received all tbe instalments, except that of the last quarter; which the defendant refused to pay, And on August 11, 1879, the plaintiffs brought this action upon the defendant’s contract, in their own name, to recover the sum due. The action was duly entered at the following September term, but neither the assignment nor a copy thereof was hied with the writ.
At the second term, when the action came on for trial and after the plaintiff had read his writ, the defendant submitted a written motion to dismiss the action upon the ground that the assignment or a copy thereof was not filed with the writ; which motion rvas overruled. The plaintiffs’ counsel then offered to file a copy of the assignment, which is to be considered as done if competent. The defendant thereupon filed a general demurrer to the declaration which was joined, and the case was thereupon reported to this court, "who are to consider the motion and the effect of it the same as if no ruling had been made,” and arc to order the proper judgment on the whole case.
It is contended that the motion should be sustained by reason of the provisions of stat. 1874, c. 235/and of Buie n, of the general rules of this court.
Statute 1874, c. 235, provides that an assignee of a chose in action not negotiable, assigned in writing, may bring and maintain an action thereon in his own name; and that he " shall file with his writ the assignment or a copy thereof.” Bule n, provides : "Bo civil action shall be entered after the first day of the term, unless by consent of the adverse party and by leave of court; or unless the court shall allow the same upon proof that the entry was prevented by inevitable accident, or other sufficient causes. . . Writs are to be filed before entry of tbe action and are to remain on file.”
Admitting the contract of tbe defendant declared on to be valid, tbe declaration shows every fact that is essential to the plaintiffs’ right to maintain the action in their own name. Wood v. Decoster, 66 Maine, 542. And the motion finds no fault with the writ or declaration, but seeks to prevent the recovery of a judgment against the defendant, on a good cause of action properly counted on, on the ground of the plaintiffs’ omission to *374seasonably file a paper declared on, and which had been duly and seasonably executed, and was then in court and placed on file when the motion was submitted. The motion, therefore, does not go to the merits of the action but to matter in abatement.
The learned counsel of the defendant urges that the provision of the statute requiring the filing of the assignment was enacted for the benefit of the defendant, that "he may be apprised at the earliest moment of the nature of the claim,” etc. But he gains that information from the declaration the same as if he were sued on his .promissory note by an indorsee, or on his mortgage by an assignee thereof. Moreover, admitting the object of the pro^ vision to be as claimed, a complete answer is found in the useful and highly reasonable principle on which the doctrine of waiver is founded, and which is so extensively applied. "For whilst,” says Shaw, C. J. "the law protects the right of parties, even in minute and unimportant matters, it requires diligence and good faith in taking advantage of its rules to accomplish those ends and not to work injustice.” Simonds v. Parker, 1 Metc. 508, 511. And "if a party,” continues the same authority, "takes no notice of any matter of exception to the form or service of the process, in an early stage of the proceedings, it affords a a reasonable ground to conclude that he considers them of no importance, and is willing to proceed to the trial of his rights upon the substantial merits of the controversy.” And the rule relating to matters in abatement is based upon this, principle and holds parties to its reasonable requirements.
This finds illustration in numerous classes of cases. Thus B. S., c. 81, § 6, provides that "every original writ, etc., "shall, before entry in court, be indorsed by some sufficient inhabitant of the State, when the plaintiff is not an inhabitant thereof.” And notwithstanding this imperative language, the court in Massachusetts, long before the separation said: "The provision was made for the benefit of the defendant, which, if he pleased, he might waive; and if at the return term he does not except to the want of an indorser either by plea or motion, he must be considered as having waived the security provided for his benefit.” Whiting v. Hollister, 2 Mass. 102. Such has been the ruling *375in tins Slate ever since. Archer v. Noble, 3 Maine, 418 5 Stevens v. Getchell, 11 Maine, 443 ; Smith v. Davis, 38 Maine, 459.
Again, E. S., c. 96, § 10, provides that "the officer, before serving a writ of replevin, shall take from the plaintiff, or some one in Ms behalf, a bond to the defendant, with sufficient sureties, in double the value of the goods to be replevied,” etc. And yet this court has frequently decided that this provision was made for the benefit of the defendant and that he may waive it. So that if the bond is defective in having only one surety whim the .Statute requires two, the defendant will waive the defect unless ho takes advantage of it by motion or plea in abatement. Johnson v. Richards, 11 Maine, 49; Greely v. Currier, 39 Maine, 516. And if the bond be not "in double the value of the goods to be replevied” the defect must be pleaded in abatement, although the defendant did not know the fact until the trial. Douglass v. Gardner, 63 Maine, 462.
The rule requires writs to be filed when entered, and allows entries to be made after the first day "for sufficient causes,” that is, at the discretion of the court. Then comes the statutes requiring the filing of the assignment "with the writ.” If in this case, the plaintiff had omitted to enter his action and file his writ the first day, the court would have allowed him to enter'it afterward; and then by the letter of the statute he could have filed Ms assignment. The question of filing the assignment not having been raised by motion or plea in abatement, we think the court could allow the subsequent filing the same as it allows writs to be indorsed under similar circumstances.
But the defendant contends that Prescott v. Hobbs, 30 Maine, 345, is decisive of this case in his favor. We think otherwise. As at common law, a breach of the covenant of seizin of one not seized is broken when made, the right of action thereon does not pass to the assignee of the covenantor’s grantee; and hence the assignee cannot maintain an action thereon in his own mime at common law. But to "avoid circuity of action,” (Trask v. Wilder, 50 Maine, 453,) the legislature changed the common law conditionally, by providing in substance that the assignee oi *376the covenantor’s grantee, might, upon eviction, maintain such action in Ms own name, "upon filing"at tbe first term in court for tbe usé of Ms grantor, a release of tbe covenants of Ms deed and of all causes of action thereon.” R. S., c. 82, § 15. Tbe release in such case is not for the benefit of tbe defendant but for tbe "use of tbe defendant’s grantee.” Hence tbe principle of waiver, as in cases of want of an indorser of a writ, or of defective replevin bond cannot apply; and tbe case of Prescott v. Hobbs, is not applicable in principle to tbe case at bar. Our opinion therefore is that tbe defendant waived tbe objection to the plaintiffs’ omission to file tbe assignment or a copy thereof with tMs writ; and that tbe presiding justice, in tbe absence of any seasonable motion or plea in abatement, bad discretionary power to allow tbe subsequent filing.
But tbe defendant demurred to tbe declaration, thereby admitting all tbe facts therein properly alleged. Among those are tbe allegations that Frye, on May 1, 1873, was sole contractor with tbe United States for carrying tbe mail on routes nineteen and one hundred and twenty-one for four years ending July 1, 1877; and that in consideration Frye bad sold, transferred and assigned all bis interest in tbe contract with tbe United States, tbe defendant bad made to Frye, tbe contract declared on.
Tbe contract declared on, therefore, if tbe declaration be true, was given in consideration of Frye’s .assignment of Ms contract as contractor for transporting tbe United States mail; and such assignment is declared null and void by tbe express provision of United States, Eev. Sts., § 3963.
Demurrer sustained. Declaration bad. Plaintiffs may amend on such terms as shall be fixed at nisi prius.
Appleton, C. J., Walton, Barrows, Danforts and iSymonds, JJ., concurred.