I think it is such a pity that this vintage dog image is completely unattributed. It appeared in Our Pets from around 1880. No author, illustration or publishing information was included.
Here we have a sad-looking, but patient dog, sits quietly after being dressed like a girl even with a flowered hat. This image of a dressed dog would make a great image for scrapbookers looking for dressed pet pictures.
This image is copyright free and in the public domain anywhere that extends copyrights 70 years after death or at least 120 years after publication when the original illustrator is unknown.