There’s a better map here - https://luna.manchester.ac.uk/luna/servlet/view/search?q=five%20feet&sort=reference_number%2Ctitle&os=0&pgs=50&cic=maps002%7E1%7E1This is the most detailed set of maps I’ve ever found on line for the centre of Manchester.You’ll find Gay Street in the NW corner of sheet 38.