Pearn says the diary helps “rehabilitate” Henrietta as well as help better understand the editorial role Darwin’s whole family played in shaping his work. “Henrietta’s contribution to Darwin’s work, in particular on religion, has been seen as purely negative – ‘editing out’ rather than editing in any constructive sense,” Pearn says. “Now we can see her as her father saw her, as a ‘dear coadjutor & fellow-labourer’, and as a lively member of an intellectually stimulating household.”Darwin has long been portrayed as spending his time at home as a near hermit, with only occasional contact with his family and the outside world. I’m glad to see that view being overturned to some degree by his diary of his daughter Henrietta. Although it was known that she did some editorial work on her father’s works, it was generally assumed that her fervent religiosity made her give it a more pro-religion voice. Her personal writings indicate otherwise, that she was actually quite involved with the process and ideas, and that any editing was largely constructive to the science it contained.