Charles Blake Allnatt (1792–1862) was a barrister and the maternal grandfather of Henry Salt. He was born in Wallingford, Berkshire, the first child of Charles Atherton Allnatt and Martha Blake. On 17 February 1818 he married Elizabeth Sophia Möller at Wem, Shropshire. Part of Salt’s childhood was spent at the Allnatt home at 23 The Crescent, Shrewsbury. Charles Blake Allnatt was “shy,” “sensitive,” and “whimsical,” qualities inherited by his grandson. Charles died on 17 January 1862 at The Crescent and was buried at St Chad, Montford, Shropshire.