George Walker 
True Account of the Siege of London-Derry [PDF ebook] 

Whilst the greatest effort has been made to ensure the quality of this text, due to the historical nature of this content, in some rare cases there may be minor issues with legibility. HE Form of the Town comes somewhat near an Oblong or long Square; and its Situation lengthways, is N. W. And S. E. Or a Diagonal drawn from the Church through the Market-house, to the Magazine, is near upon a N. And S. Line. The Length of the Town through the mid dle from Ship-key gate to Bish s-gote, is about 300 Paces, or 1500 Feet. This Wall on the W, side the Town 320 Paces; the Wall on the E. About 380. The Breadth at the jv. W. End 140 at the se. End 120; from Butchers-gate to Ferry key-gate, where the Town is Broadest, 180 Paces.