A Young Boy Sketching His Dog with His Sister at His Side in a Landscape (1850)
(a.k.a.
An Impatient and Patient Sitter)
by
J. C.
I've been able to locate no information about this artist other than the fact he or she was probably British.
The dog pictured here may well be a Newfoundland as the breed often appeared in the mid-19th Century.