Rhinoceros

A rhinoceros is a large-horned beasts that live in plains. In some places two men on horseback herd the animals using casting ropes (lasso). They chase the beasts as they run across the plain. With the lasso they are able to catch them and tie them up forcing them to lay on the ground.

A picture in Cyclopedia on the topic of herding, showed two men chasing two beasts, while a third was lieing on the ground.

The head of a rhinoceros was on the wall of Abdul Alhazred's study.

Behind the scenes
Technically the beast mentioned in See No Weevil are not necessarily rhinos but the description seems to fit the bill.