Toby
Burrard in his book, The Modern Shotgun, Vol;1 page 38, plate V published in 1931, selected a side lock shotgun engraved, "Manton" to illustrate the different parts of the action of a gun.
Burrard must have held these Webley Mantons in some regard. There is also the possibility that Burrard did not want to offend the active London makers of the day and thus chose for illustration purposes, a gun with the name of a respected deceased maker.

Roy Hebbes