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Author: Morden, Robert
Publisher: Abel Swale, Awnsham & John Churchill.
Date published: 1722Copper engraving; later hand colouring. Overall size : 45.5cms x 39cms. Engraved size : 414mm.x 357mm. Title in decorative cartouche at top with three scales of distance bottom left. Centre fold as issued. Very good condition. Morden based his maps on manuscript sources plus the surveys of Ogilby and Morgan, Seller, Palmer and the coastal charts of Captain Grenville Collins. One innovation was the showing of longitudes measured from the meridian of St. Paul's Cathedral given in the form of time in minutes at the top of the map in Roman numerals and at the bottom in degrees. This was done to clarify local times that were taken from the sun as there was no national standard time. Gibson said:' Where actual Surveys could be had, they were purchased at any rate; and for the rest, one of the best Copies extanct was sent to some of the most knowing Gentlemen in each County; with a request to supply the defects, rectified the positions, and correct the false spellings. And that nothing might be wanting to render them as complete and accurate as might be, this whole business was commited to Mr Robert Morden, a person of known abilities in these matters'..from the Preface of the Britannia.