Another map I like is this one from Heritage Cartography of Greenock in 1856. Once again they have an online service and cover many places in the UK.
Of course you can view many maps online. My favourite site for Scottish maps is the National Library of Scotland site of town plans. They have a fabulous collection of old maps to look at and you can zoom in for great detail.
A bit addictive, though, looking at these old maps!!!!!