One of two pieces of submarine telegraph cable of shore end type laid in 1885 in the Persian Gulf, one piece dissected to show layers, made for the Persian Indo-European Telegraph Department, 1885

One of two pieces of telegraph cable with a stranded copper core insulated with gutta percha, covered with tape and armoured with hemp rope

One of two pieces of telegraph cable with a stranded copper core insulated with gutta percha, covered with tape and armoured with hemp rope

Submarine electric telegraph cable with copper wire conductors and insulated with gutta percha, used between the deep sea and shore end cables and known as an intermediate cable, by W.T. Henley's Telegraph Works Co. Ltd, Woolwich, London, 1850s - 1860s

Box telephone consisting of a horseshoe magnet mounted horizontally on two blocks of wood, each with a coil of wire on a wooden spool on ends held parallel to a metal diaphragm

Transatlantic submarine telegraph cable, length of metal, gutta percha and yarn, recovered by cable ship John W. Mackay in 1952 while repairing a modern cable in the mid Atlantic, 1880 - 1910

One of nine assorted gutta-percha golf-balls, marked 'Musselburgh', c. 1890