For instance Lock 21 had many lockkeepers: Mr. Fuller (1830), Mrs Susan Cross (1836), Robert C Fields (1839, Fired on 1 May 1846), Samuel Fisher (1846, 1851), and Jesse Swain (1924), hence today the lock is known as "Swain's Lock".
The history of Lock 21 is marked by a succession of keepers: Mr. Fuller (1830), Mrs Susan Cross (1836), Robert C Fields (1839, fired on May 1st, 1846), Samuel Fisher (1846, 1851), and Jesse Swain (1924). This is why the lock is now known as "Swain's Lock".