European Wolf, Black Wolf of North America, St.Bernard's Mastiff, Highland Greyhound, and Great Dog of Nepal from A history… Free Image from public domain license 
Illustration of two hunting dogs from Sporting Sketches (1817-1818) by Henry Alken (1784-1851). Original from The New York… Free Image from public domain license 
Illustration of hunting dogs from Sporting Sketches (1817-1818) by Henry Alken (1784-1851). Original from The New York Public… Free Image from public domain license 
