Transactions of the Institute of British Architects of London (1835)
Royal Institute of British Architects · London · leaf 181
ts. The plan No. 1 will explain the form of the newly discovered Crypt. It measures 105 feet 4 inches in length by 56 feet in breadth, and extends from the Crypt, formerly supposed to be the only one, to the base of the great central tower or transept. That part marked black will explain the form… … p
Architecture
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.