Plaintiff and defendant bought a fishing boat, which they operated in partnership for a number of years, under an agreement embodied in a series of informal letters. Both plaintiff and defendant at times ran the boat, but apparently they never operated it together. The partner in charge received the customary share of the crew\u27s two-thirds of the catch, plus compensation for services rendered as captain; each of them received half of the \u27\u27boat\u27s share of the catch. Defendant bought materials for some special nets, which he designed and constructed; he informed. plaintiff that he was doing so, and that it would cost quite a lot and be lots of work. Subsequently, without informing plaintiff, defendant took half of the boat...