Marilyn Arnold wrote: >... > >I see the 1821 Ordinance Survey. > Not "Ordinance" - "Ordnance" (without the "i"). This is an old word meaning "artillery" or "gunnery", and commemorates the fact that the UK's first accurate, large-scale, national mapping scheme was started by artillery officers during the Napoleonic Wars, as a defence measure. And not 1821, not, at least, for Dundee. The Ordnance Survey started work around 1806, but the first large-scale Ordnance Survey maps of Dundee and Angus were not published until the 1860s. The map that Pat suggested you view on the NLS site was from John Thomson's "Atlas of Scotland" (published 1832). This is of variable accuracy, but does bridge the gap between the Ainslie map of 1789 and the appearance of the OS maps in the 1860s. Gavin Bell