	Sadler was specially interested in the history of the older English presbyterianism. His tastes led to a commission, in 1867, to edit Henry Crabb Robinson's "Diaries". The work appeared in 1869, and went to a third edition in 1872; but only a small portion of the Crabb Robinson papers were used utilised. With some devotional works, Sadler was also author of "Edwin T. Field: a memorial sketch", 1872; "The Man of Science and Disciple of Christ", a funeral speech for William Benjamin Carpenter, 1885; and "Prayers for Christian Worship", 1886.