On the presentation of Roundell Palmer, 1st Earl of Selborne, he became vicar of Blackmoor, Hampshire, in 1868, and in 1874 he accepted from Lord Braybrooke the living of Saffron Walden.
[1] A connection with Rochester Cathedral began with Jelf's appointment in 1880 to a residentiary canonry, a position he held for twenty-seven years.
For financial reasons he took on extra clerical duties: the rectory of Wiggonholt near Pulborough in Sussex (1896–7); and when this proved too much, from 1897 St German's, Blackheath.
[1] In 1904 Jelf resigned his Blackheath benefice and retired to Rochester; but in 1907 he was appointed Master of Charterhouse in succession to William Haig Brown.
He was buried on the eastern side of Highgate Cemetery, and on the same day a memorial service was held in Rochester cathedral.
[1] A moderate high churchman, Jelf was a friend and godson of Edward Bouverie Pusey, whose Christus consolator (1883) he edited.