U.S. National Archives:
Dall sheep ram
Cornell University Library:
[Porter carrying clay pots strapped to A-frame on his back]
Internet Archive Book Images:
Image from page 229 of "Elements of biology; a practical text-book correlating botany, zoology, and human physiology" ([c1907])
Dvortygirl:
Greenhouse
The British Library:
British Library digitised image from page 189 of "Round the World by Doctors' Orders. Being a narrative of a year's travel, etc"
The British Library:
British Library digitised image from page 165 of "Finland in the Nineteenth Century: by Finnish authors. Illustrated by Finnish artists. (Editor, L. Mechelin.)"