Some consecutive phases of the Gallop.
<bdi><a href="https://en.wikipedia.org/wiki/en:Eadweard_Muybridge" class="extiw" title="w:en:Eadweard Muybridge"><span title="English-American photographer">Eadweard Muybridge</span></a>
</bdi>
1893
<i>Descriptive Zoopraxography, or the Science of Animal Locomotion made Popular</i>