Giles Whittome was commissioning some large-bore single-shot rifles on a falling-block action by John Shirley. Initially, the .577 NE version was called the "Elephant" and the .700 NE version was called the "Mammoth".

Don't know the Monica for the .600 NE.

There was a comprehensive article on these rifles in the very first issue of the British Rifleman magazine in 1995.

Ross Seyfried would simply HAVE to have one of these!!