Possible Clues:

• Maybe fired with anger and inclination
• They make a bolt for it
• Weapon for an irate violinist
• Old weapon
• Old weapon with mechanism for firing arrow
• Shooter mad to play the fiddle
• Traverse Cockney district to find a weapon
• One responsible for shooting bolts, to travel through East End?
• Weapon similar to an arbalest
• Peevish greeting can precipitate a quarrel