A, residing in Calcutta, is agent for Z, residing at Delhi. There is an express or implied contract between A and Z, that all sums remitted by Z to A shall be invested by A, according to Z's direction. Z remits a lakh of rupees to A, with directions to A to invest the same in Company's paper. A dishonestly disobeys the directions and employs the money in his own business. A has committed ____________?