Possible Clues:

• Genealogical science for the lady's almost entirely uninteresting
• Lyre hard to play? It's that business with the arms!
• It involves coats of arms and the like
• Coat of arms study
• Hardly wrong doing the rounds of hospital ward investigating everything to do with the Knights
• The study of armorial bearings
• Field involving coats-of-arms
• Classification of armorial bearings
• Harry led astray in armorial research
• Coats of arms, etc