The Descent of Man, and Selection in Relation to Sex

First-issue text has 'transmitted' as the first word on page 297 of volume 1 (reset to 'When' in the second issue), errata for both volumes printed on the verso of the volume 2 title leaf, and a tipped-in 'Postscript' leaf at pages [ix]-x of volume 2 in which Darwin acknowledges 'a serious and unfortunate error' affecting pages 297-299 of volume 1 and pages 161 and 237 of volume 2