The forests on the banks of the Congo are filled with precious red-wood, lignum vitæ, mahogany and fragrant gum trees.

From both logwood and lignum vit are extracted medicines which physicians often use.

I have somewhere in this narrative alluded to lignum, and it may not be out of place at this juncture to describe what it is.

The cooking apparatus was a boat's stove, eighteen inches long, and nine inches broad, in which lignum vitæ was used as fuel.