John Colvil of Kelling in Norfolk, in his concern to promote the study of science, natural as well as artificial, gave this Museum a very large stone which was removed with admirable skill by the highly experienced surgeon, John Hubbert of Norwich, from the bladder of a certain Beatrice Shreve of Tunstead in the same county, without either any incision or tearing. To dispel all disbelief, the mayor, justices of the peace, aldermen and members of the city's council, all gathered together in the town hall thought it only fitting to pass down to posterity the truth of the event by drawing up a document to this effect, sealed with the city seal, and by mounting the stone itself.