The action is on accepted bills of exchange for goods sold by the appellant to appellees. The sale was by sample, and the intent of the pleader, as indicated by pleas 3 to 6, inclusive, was to assert a rescission because, to generally state it, the goods received did not substantially come up to the sample, in material, make, etc. The report of the appeal will contain a summary statement of the matter set up in these pleas.

In the early case of Burnett v. Stanton & Pollard, 2 Ala. 181, 189, it was said: “An offer to return the chattel in a reasonable time, on the breach of warranty, or where a fraud has been practiced on the purchaser, is equivalent in its effect upon the remedy, to an offer to accept by the seller, and the contract is rescinded. But the vendee, in such case, must act with promtpjness, and, upon discovering that the subject-*300matter is not such as was contemplated, he must offer to return it. * * * But a contract cannot be rescinded, without mutual consent, where the circumstances have been so altered by a past execution that the parties cannot be put in statu quo, for if it be rescinded at all, it must be done in toto. * * * If the vendee neglect to return the goods, * * * but keep them and treat them as his own, by putting them up for sale, or exercising other acts of ownership over them, he cannot afterwards reject the contract.”

Burnett v. Stanton & Pollard, supra, in the particulars quoted, has been followed, literally or in principle, in these subsequent decisions: Knight v. Turner, 11 Ala. 636; Ward v. Reynolds, 32 Ala. 384, 393; Stephenson v. Allison, 123 Ala. 439, 447, 26 South. 290; Hayes v. Woodham, 145 Ala. 597, 40 South. 511; Eagan Co. v. Johnson, 82 Ala. 238, 2 South. 302—among others.

In Stephens v. Allison, supra, it was by way of approving quotation, said: “He cannot hold onto such part of the contract as may be desirable on his part and avoid the residue; but rescind in toto, if at all.”

Parsons on Contracts, vol. 2 (9th Ed.) pp. (bottom) 834, 835, thus expresses the rule: “Generally, no contract can be rescinded by one of the parties unless both can be restored to the condition in which they were before the contract was made. If, therefore, one of the parties has derived an advantage from a partial performance, or so disposed of the property bought that he cannot restore it, he cannot hold this and consider the contract as rescinded because of the nonperformance of the residue.” (Italics supplied.)

Where restoration is impossible — restoration that would put the parties in the condition existing before the contract was made — or the article purchased is valueless, the buyer’s remedy is for an abatement of the *301price agreed to be paid, by way of recoupment, or by separate action.—Eagan Co. v. Johnson, 82 Ala. 238, 2 South. 302; Jones v. Anderson, 82 Ala. 302, 2 South. 911] Parsons on Contracts, p. 834, and notes.

Both Eagan Co. v. Johnson and Jesse French Piano Co. v. Bradley, 138 Ala. 177, 35 South. 44, are cited by counsel to support the proposition that where there has been a total or partial payment of the price the purchaser may qualify his otherwise unconditional tender back, looking to rescission, by a retention of the possession until the seller makes restitution of what he has received and so on the theory of the purchaser’s security thereby. These cases maintain that doctrine, but neither of them assume to or does impinge upon the other doctrine that rescission, for breach of warranty, must be of the whole, not merely a part of the contract. In Eagan Co. v. Johnson, the court expressly ruled that Johnson, by a sale of the machine, precluded rescission of the contract by him. In Jesse French Piano Co. v. Bradley, the purchaser had not parted with the piano, subject of the bargaining, and ivas justified in the retention thereof because he had made to the company partial payment of the agreed price. These two decisions, in the particulars indicated, are not, in any sense, opposed to the conclusion to which we are driving in respect of the sufficiency, on demurrer, of pleas 3 to 5, inclusive. It affirmatively appears from the averments of pleas 3, 4, and 5, that a part of the jewelry had been disposed of by the defendants and their offer was, as shown by these pleas, to restore that part of the subject of the sale to them, by plaintiff, undisposed of, and. to pay for that part which had been so disposed of. Obviously, the restoration necessary in order to effect rescission of the contract in toto was impossible of accomplishment, the defendant having disposed of a *302part of the subject-matter of the sale, and that disposed of not being shoAvn to be valueless. If the defendants were alloAved, as these pleas assert, to pay for part, and to thereby affirmatively avail of the contract to that extent, and to restore the remainder, that undisposed of, only, the very essence of the rules controlling the rescission of contracts Avould be violated.

Accordingly, the seventh ground of demurrer to pleas 3, 4, and 5 should have been sustained. The court erred in overruling it, as to the mentioned pleas. Since this ruling is vital to the theory upon Avhich pleas 8, 4, and 5 proceed, it is not necessary to consider, Avith a view to a disposition of this appeal, other grounds assigned in the demurrer against them.

It is the duty of one intending to rescind a contract to, within a reasonable time, give to the other party notice of his disaffirmance.—Elliott v. Howison, 146 Ala. 568, 589, 40 South. 1018; Burnett v. Stanton & Pollard, 2 Ala. 181, 189; 24 Am. & Eng. Ency. Law, p. 645. Doubtless this requirement is met where the offer to restore, with a vieAV to rescission, is accompanied by an explanation of the purpose thereof.

In that class of cases Avhere the relation of a carrier to a consignment depended upon whether the consignee had had a “reasonable time” in which to remove the consignment, this court ruled that, Avhere the evidence is without dispute, what is a “reasonable time” is a question of law for the court.—Collins v. A. G. S. R. R. Co., 104 Ala. 390, 16 South. 140; C. & W. Ry. v. Ludden & Bates, 89 Ala. 612, 7 South. 471; Tallassee Falls Co. v. Western Ry. of Ala., 128 Ala. 167, 29 South. 203.

In the case at bar Ave are invited, by the demurrer to plea 6, to condemn the plea because the offer to restore the goods to the seller was alleged to have been “Avithin a reasonable time” after discovery of the *303breach of warranty asserted therein, a.nd that the averment of time elapsing thereafter is a conclusion of law and not an allegation of fact. Generally, pleadings are demurrable where conclusions of law are asserted therein.

In Morgan v. McKee, 77 Pa. 228, 231, treating the rescission of a contract, it was said: “They were bound to make their election within a reasonable time; and what is a reasonable time or undue delay where the facts are not disputed is a question of law to be determined by the court. * * * Reasonableness in such cases belongeth to the knowledge of the law, and is therefore to be decided by the justices. * * *” To the like effect is Bacon v. Green, 36 Fla. 325, 348, 18 South. 870.

Reasonableness, as respects time, in cases of the character under consideration, being a question of law, if the facts are undisputed, we think it must be held that the stated objection, taken by the demurrer, should have been sustained. It is clear that to sustain, in any degree in the proof, such an averment, viz., “within a reasonable time,” the pleader must adduce evidence showing when the breach of the warranty was discovered, on the one hand, and on the other, when, on that account, he notified the seller of his disaffirmance. If, to carry his burden, he must present the necessary evidential data, from which, if undisputed, the court must conclude reasonableness vel non, in respect of time elapsing, no undue» weight is cast upon him when he is required to substitute, in averment, for the conclusion the court must pronounce if the evidence be not in dispute, succinct allegations of fact leading, as matter of law, to that result. If the pleader, as a witness on the issue, were asked whether he disaffirmed “within a reasonable time,” we doubt not that the question would be subject to the objection that a conclusion of the witness *304was sought. While of course it is never necessary that pleadings should assert, in extenso, the evidence upon which the cause of action or defense rests, yet where, as here, the very essence of the defense — rescission—in an action for the price agreed to be paid, depends upon the promptness with which the purchaser acted after discovery of the breach of warranty, the facts and not alone the conclusions, should be set out.

For the errors indicated, the judgment is reversed, and the cause is remanded.

Reversed and remanded.