The correct answer to this open question is the following.
The question is incomplete. You forgot to include the quotation. However, doing some research, we can comment on the following.
We are referring to the “Relation of the Conquest of Florida,” written is 1544.
The quotation could refer to the characteristics of the Florida land. It is described as swampy and uninhabited. It refers also to the raw materials and natural resources found in Florida. It also says that explorers crossed the river in a boat and found a place called Acapachiqui, and knew the native American Indians that lived there.