Stair, which is well described in the quotation above, is a very small parish in the centre of the county, sandwiched between Coylton and Ochiltree. The current Stair Parish Church has its own web page.
An 1837 description of Torbolton (as it was then spelt), Failford, Stair and Joppa, including a listing of the key personalities, is given in this extract from Pigot's Directory for Ayrshire. The transcript was provided by Keith Muirhead from Queensland.
You can see pictures of Stair which are provided by:
You can see maps centred on OS grid reference NS439236 (Lat/Lon: 55.481218, -4.471666), Stair which are provided by: