Section 156 in The Indian Contract Act, 1872
Title: Effect of mixture, without bailor's consent, when the good can be separated.
If the bailee, without the consent of the bailor, mixes the goods of the bailor with his own goods, and the goods can be separated or divided, the property in the goods remains in the parties respectively; but the bailee is bound to bear the expense of separation or division, and any damage arising from the mixture.
A bails 100 bales of cotton marked with a particular mark to B. B, without A's consent, mixes the 100 bales with other bales of his own, bearing a different mark: A is entitled to have his 100 bales returned, and B is bound to bear all the expense incurred in the separation of the bales, and any other incidental damage.
Title: Effect of mixture, without bailor's consent, when the goods cannot be separated.
If the bailee, without the consent of the bailor, mixes the goods of the bailor with his own goods, in such a manner that it is impossible to separate the goods bailed from the other goods, and deliver them back, the bailor is entitled to be compensated by the bailee for the loss of the goods.
A bails a barrel of Cape flour worth Rs. 45 to B. B, without A's consent, mixes the flour with country flour of his own, worth only Rs. 25 a barrel. B must compensate A for the loss of his flour.
Title: Repayment, by bailor, of necessary expenses.
Where, by the conditions of the bailment, the goods are to be kept or to be carried, or to have work done upon them by the bailee for the bailor, and the bailee is to receive no remuneration, the bailor shall repay to the bailee the necessary expenses incurred by him for the purpose of the bailment.
Title: Restoration of goods lent gratuitously.
The lender of a thing for use may at any time require its return, if the loan was gratuitous, even though he lent it for a specified time or purpose. But if, on the faith of such loan made for a specified time or purpose, the borrower has acted in such a manner that the return of the thing lent before the time agreed upon would cause him loss exceeding the benefit actually derived by him from the loan, the lender must, if he compels the return, indemnify the borrower for the amount in which the loss so occasioned exceeds the benefit so derived.
Title: Return of goods bailed, on expiration of time or accomplishment of purpose.
It is the duty of the bailee to return, or deliver according to the bailors directions, the goods bailed, without demand, as soon as the time for which they were bailed has expired, or the purpose for which they were bailed has been accomplished.