Both sets of maps ended up in the collection of Robert (1661-1724) and Edward (1689-1741) Harley, the 1st and 2nd Earls of Oxford, thousands of manuscripts, printed books and associated materials which became one of the founding collections of the British Museum in 1753. Norden’s work, produced for and originally owned by James VI and I, came into the Harleys’ possession in 1710, whilst Van der Keere’s maps reached the collection in 1725.
In addition to their shared provenance, it is interesting to note that the two mapmakers knew and worked with each other. As well as his surveying work and devotional writing, Norden conceived of a grand multi-volume county-by-county geography or ‘chorography’ of Britain, having recognised, like others, the public appetite for maps and geographical writings following the success of Christopher Saxton’s atlas of 1579. Norden’s Speculum Britannia was not completed, but he started work on a number of counties, and even published some of them. The first published county, in 1593, was Middlesex, containing maps including ones of London and Westminster engraved by one Pieter Van den Keere.