 It was located in the roof of a tunnel 55 metres (180 feet) underground.Roughly shaped like a horse's head, it measured around 49 cm (18 in) long by 15 cm (6 in) wide and 15 cm (6 in) high, and had a roughly indented surface.It was assayed by William Birkmyre of the Port Phillip Gold Company  and given its name by finder Richard Jeffery.