1920-1921 - A cross-sectional view on a line indicated 'A-B' in the mid-image showing the stone pitching minimum angle expressed as a ratio of 2:1.
Also: 'Note : No. 5 trestles to be fixed on stone arching with Lewis strap bolts. No. 50 holes 4 in. x 3½ in. x 9 in. to be drilled.' These views are taken from the GWR drawing of the northern jetty at Penarth Dock.
The original of this drawing is held at the archive of the National Museum of Wales. [Museum item number : 88.88I/15] [629] [20180514]