[Original 1931 text] "The three-headed beast on seal 382 appears to be a composite of three animals. The heads and horns seem to be those of antelopes and the body of a unicorn. The heads have been joined to the body very carefully.
Ancient Indus Valley civilization seals
Iravatham Mahadevan believes that the terminal sign used here is actually a combination of two signs. The bottom part (figure carrying) denotes a bearer of office.
Although the Indus Valley script is still undeciphered, there is some agreement among a number of leading scholars that it represents some sort of proto-Dravidian language common in South India today.
In addition to any commercial functions, the seal may also have designated a position of authority. The motif on the seal could also have been an amulet or charm.
The seal itself was probably worn around the neck, with a chord passed through the boss
The unicorn always has this object in front of it. There are at least five theories about this object. Mackay and Marshall thought it was the feeding trough or "manger" still seen in Sindh today.