Green’s Dictionary of Slang

St Hugh’s bones n.

also Sir Hugh’s bones
[given that the trad. patron saints of shoemakers are St Crispin and St Crispinian, the link to sense 1 is not obvious; whether the Hugh in question was St Hugh (c.1140–1200) or Hugh of Lincoln (d.1255), supposedly murdered in a race libel against the city’s Jews, is unknown]

1. [17C] (also bones of St Hugh) shoemaker’s tools.

2. [mid-19C] dice.