Where a broker is employed to negotiate for a house his compensation to be paid for in diamonds, no particular diamonds being particularly identified, and the broker finds a house and the principals agree as to the price, the broker can not be deprived of his compensation by his employer's capricious refusal to agree to any mode of appraising the diamonds. West v. Lynch, 1 City Court R. (N. Y.) 225. See also Sec. 454.