| Description | Correspondence regarding Peter O'Hara, including:
Detailed procedures for the O'Hara Chromosome (new) Stain Technique.
Letters between Penrose, R C Buck, and Selwyn Dewdney regarding a work placement for O'Hara at the University of Western Ontario.
Letters from O'Hara, updating Penrose on his progress in the position, and introducing Cathy Cushman, a graduate student at the University of Western Ontario.
Correspondence between Cushman and Penrose regarding statistical analysis. |