Captioned A T Nowell (PC_Ledoux15)
Possibly, British artist Artthur Trevithin Nowell (1862-1940).
![A T Nowell 1933](../../_Media/a-t-nowell-1933_med.jpeg)
Nowell apparently depicted himself in self-protrait with Edmund Wimperis in this painting ->
Nigel French's website - a random collection of information and links which interest me and maybe others