What kind of work does Crusoe do for his new master at Sallee?

Crusoe was delegated gardener while his master was away, and a guard for his master's ship when he was in port.

But this hope of mine was soon taken away; for when he went to sea, he left me on shore to look after his little garden, and do the common drudgery of slaves about his house; and when he came home again from his cruise, he ordered me to lie in the cabin to look after the ship.