That in the early modern period the Hammermen were the largest and most prestigious craft in St Andrews? Hammermen were metalworkers, and in St Andrews the craft included silversmiths, goldsmiths, armourers, blacksmiths, wheel-wrights, cutlers and pewterers, saddlers and lorimers (who made metal horse-trappings). Much of their business came from the many religious institutions in St Andrews.
The composition of the Hammermen craft varied between towns. In Edinburgh the craft included locksmiths, while in Aberdeen it even included skinners and glovers, presumably because they were too few to warrant a craft of their own.