Dr Listererine and Dr Theasaurus.

Both lived along the sea front at Walmer. Joseph Lister was the pioneer of antiseptic surgery. Very much in use to this day, Listerine was first produced in 1879, in St.Louis ,Missouri.
The Theasaurus that Roget and his dad before him came up with has never been out of print since 1852, with over 30 million copies sold worldwide