tributary• I was on Lyne Water at the time, a tributary of the River Tweed.• Fed by different tributaries, as DonF6lix was saying before when he was waxingpoetic.• They started in small workshops in the uppercoursevalleys of the River Don and its tributaries, such as the River Sheaf.• Dace hard to find, even the Llynfi tributary at Glasbury is giving little.• Allen Water, a majortributary of the South Tyne, offeredperfectdryflyfishing.• The principal river systems and their major tributaries are described below.• Settlement was concentrated in fishing villages on the tributaries of the Snake, Clearwater and Salmon Rivers.