Ali appoints Gull to act as his agent for two weeks. Gull agrees to act without payment. Ali instructs Gull to collect rent each Friday morning from his tenants and pay the rent into the bank next door. In the second week, Gull collects the rent but fails to bank it. On the way home, he leaves it on the bus and it is never recovered.

Required: Advise Ali whether he can take action against Gull for breach of his agency duties?