 Joel Upton, supporting Waagen's analysis, investigated whether the "famous Talbot" was John Talbot, 1st Earl of Shrewsbury, killed at the Battle of Castillon in 1453.However, John Talbot had only one niece, Ankaret, who died in infancy in 1421.Lorne Campbell suggests that given the Latin signature, Waagen might have misinterpreted the word "nepos", which can also mean "grandchild".