The New York Public Library has digitized and put online The Orchidaceæ of Mexico & Guatemala by Jas Bateman. This rare book was published 1837-1843 by James Ridgway and Sons. The prints are quite beautiful, as these examples suggest:
Oncidium leucochilum. [White-lipped oncidium]:
Stanhopea tigrina. [Tiger-like stanhopea]
See the full book here.