Plan of Edinburgh, Leith & Suburbs /
W. & A.K. Johnston Limited.
Edinburgh : W. & A.K. Johnston,
1879.
Relief shown by rock drawings and shading.
Ms. pencil annotated title: Time gun 1881.
Ms. annotations: concentric circles, and pencil note "Time circles each one second, number of rings distant from Gun indicate no. of seconds for sound to travel".