729. Mortgagee's bonus or commission.

The mortgagee may stipulate for a commission of an amount reasonable, having regard to the risk run1. If, on making the advance, he deducts this commission from the sum stated in the mortgage deed, and pays only the balance, the full sum so stated will be allowed as the principal debt in his account2. If the commission is not deducted at the time of the advance, it will be allowed subsequently in the accounts under the head of just allowances, provided that it is stipulated for in the mortgage contract, and that the bargain is deliberately entered into while