Briggs had been one of England's most-reliable bowlers across the 1880s and 1890s — 118 Test wickets at 17.75, plus a Test hundred (121 v Australia at Melbourne 1884-85). His action — slow, looping left-arm spin — was beloved by Lancashire crowds. By 1899 he was 36 and in his fourteenth English summer.
The Third Test, the first at Headingley, began on 29 June. Briggs bowled 21 overs in Australia's first innings of 172, taking 3 for 53. Late in the afternoon he reportedly told Lord Hawke (who was watching from the pavilion) that he 'felt wrong' but could not say why. He returned to the team hotel, dined normally, and went to his room. At around 10:30pm he had a violent epileptic fit; the team doctor was summoned, and he was taken by carriage to Cheadle Royal Hospital — a mental health facility — under sedation.
The Headingley Test was completed without him; the match was drawn. Briggs spent the rest of 1899 in hospital. He recovered enough to play the 1900 Lancashire season, taking 120 wickets at 17.86, but suffered further relapses through 1901. He was readmitted to Cheadle Royal in early 1902 and died there of complications, in January 1902, aged 39.
Wisden's obituary called the case 'one of the saddest in cricket', noting that Briggs had often bowled with apparent good cheer through illnesses that he privately knew would shorten his life. He left a wife and two children; the Lancashire committee paid the family a £200 testimonial.