It’s been a little while since I’ve done one of these but… here are 511 additional map images of Northumberland (using the old Meridian) from the ‘Ordnance Survey Maps - Six-inch England and Wales, 1842-1952’ series.

Interesting places covered this update include:

Holy Island

Newcastle upon Tyne and Gateshead

And Berwick upon Tweed and Tweedmouth