The younger Sanderson was educated at the City of London School and at Clare College, Cambridge from 1856, where he won a scholarship.
[1][2] After holding a mastership at King's Lynn grammar school, Sanderson was ordained deacon in 1862 and priest in 1863.
At first curate of St. Dunstan's, Stepney, while master of Stepney grammar school, he held successively curacies at Burcombe-cum-Broadway in Dorset (with a mastership at Weymouth school), and at Chieveley, Berkshire.
[2] Subsequently, Sanderson lived at Streatham Common, writing educational manuals and popular historical works.
He died at 23 Barrow Road, Streatham Common, on 31 December 1907, and was buried at Norwood cemetery.