William “Tingha Bill” Grant was an early opal miner at Lightning Ridge. He was present in the early days of the Three Mile Flat in 1907–08. John Landers considered Grant’s claim the richest claim on the Three Mile Flat field.

Grant had a habit of moving on from a claim as soon as strangers pegged the ground within “speaking distance.” With his mate Ted Brown he found £1,800 worth of opal on New Town Hill. He had a good claim on the Telephone Line diggings. In April 1922, Bill and his mate Harold Frazer had struck opal at the Butterfly field, causing a small rush.

Away from the fields, Grant went to Sydney and bought a taxi in 1913, however records show him returning to Lightning Ridge for stretches in the 1930s.

William “Tingha Bill” Grant died in Australia (details not fully established).