Data (tracing); by Charles Robert Darwin; with See item 82 backing sheet, annotated, on reverse of [amanuensis] draft text of 'Fertilisation' ch 10 p 87 later 698 Figure; by Charles Robert Darwin in with backing sheets, annotated, on reverse of [amanuensis] draft text of 'Fertilisation' ch 10 p 87 later 698; p unknown lefthand half