William Marbury Carpenter correspondence consisting of two photocopy facsimiles of letters written by Carpenter to the Academy of Natural Sciences (Philadelphia, Pa.); originals located at the Archives of the Academy of Natural Sciences. Carpenter’s first letter (1840 July 2) relates to his new membership in the Academy. Carpenter’s second letter (1847 December 11) recommends the ornithology work of Dr. E. Pilate of Opelousas, Louisiana.