A pet dog sitting and looking up with an expectant gaze. Steel engraving by C. G. Lewis after E. H. Landseer. https://www.rawpixel.com/image/13954566/image-dog-cartoon-artFree Image from public domain licensePortrait of a Puppy (1850 - 1891) by Guillaume Anne van der Brugghen https://www.rawpixel.com/image/13734427/portrait-puppy-1850-1891-guillaume-anne-van-der-brugghenFree Image from public domain licenseBeagle, from the Dogs of the World series for Old Judge Cigarettes (1890), vintage animal illustration by Goodwin & Company.… https://www.rawpixel.com/image/11064137/image-dog-art-cigarettesFree Image from public domain licenseBasset Hound Dog, vintage pet animal illustration by Pearson Scott Foresman. Original public domain image from Wikimedia… https://www.rawpixel.com/image/11065598/image-dog-art-vintageFree Image from public domain licenseOur heads never ache: if yours does, use Nervease. Advertisement for Nervease, a headache medicine. Card features a black… https://www.rawpixel.com/image/8786640/photo-image-paper-person-posterFree Image from public domain licenseOne wirehaired and two straighthaired dachshunds coming down a path with a cityscape in the background. Etching by J. E.… https://www.rawpixel.com/image/13989199/image-background-dog-cloudFree Image from public domain license