River Tay
The River Tay emerges from Loch Tay at Kenmore, and flows from there to Perth which, in historical times, was its lowest bridging point. Below Perth the river becomes tidal and enters the Firth of Tay. The largest city on the river, Dundee, lies on the north bank of the Firth. On reaching the North Sea, the River Tay has flowed from west to east across central Scotland.
River Thame
The Thame's source is three streams which rise in the wide Vale of Aylesbury on the north side of the Chiltern Hills. These streams converge north-east of Aylesbury, the county town of Buckinghamshire. The Thame played a key role in the English Civil War when John Hampden (the town's Member of Parliament) led the force of Parliamentarians successfully defending Aylesbury at the Battle of Holman's Bridge, where a small road crosses the river, in 1642.