Shell-carrying pack mules have to be got through the mud during the First World War Stock Photo - Alamy
Amazon.com: China Peking 1901 Na Typical Springless Seatless Mule-Drawn Chinese Coach And The Driver Standing Next To It With Coal Mountain And Imperial City In The Background Peking China Stereograph C1901 Poste:
Vintage Imperial Heisey Slag Glass Caramel Brown Wild Jack Democrat Donkey Mule | eBay
From the SWISS BULLETIN: The Mule as a Workhorse in Antiquity and the Early Middle Ages
Work Horse & Mule Harness Design & Function Part 4 - Small Farmer's JournalSmall Farmer's Journal
Safari Park welcomes newborn Przewalski's horse, first for the park since 2014 | KPBS Public Media