Has been working hard on collecting English and foreign birds. Yarrell has written of new birds discovered in England.

News of work in progress by Leonard Jenyns, P. J. Selby, and John Gould.

Cautions CD to beware of insects when he sends any birds’ skins – otherwise there will be only feathers, beaks, and legs remaining when he returns.

Is sending a cargo of specimens – birds’ skins, small quadrupeds, and fossil bones.

Describes his overland trip from Rio Negro to Buenos Aires and his expedition to Santa Fé.

Asks for mineralogical works to help him with the volcanic rocks of the west coast.