Wooden ladder The third ladder - 100; made by Len Cowee 100 rungs, each 5mm in diameter set 1.75 cm apart between sides 2.5 x 1.25 cm in section; rungs numbered from lowest upward on left-hand side in black paint with denary numbers in red; hinged to fold to 46 x 15 x 6 cm [to fit Schiller's case] with metal hooks and staples to stabilize when opened out c.1956