'I am a jeweller by interest and by trade, and I have a great many pieces in various states of completion. I could finish many of these pieces, but I am missing the gems needed for the final settings.

'If you know a jeweller with a ready supply, I will give you some coins for bringing to me three polished agates of suitable quality.

'Your assistance will be greatly appreciated, for I have already neglected these pieces for too long and am eager to complete them. I have one or two items that may be useful to you, and would happily trade them to you in exchange for the agates I need.'