In a suit to cancel a deed of trust on the ground of payment to the lender's broker, the fact that the broker negotiated the loan and collected interest on the loan is insufficient to make the broker the agent to collect the principal, where the lender was in possession of the security. Heffereman v. Boteler, 87 Mo. App. 316. Compare Sec. 353, 357, also references under Sec. 307.