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

Iron throwing knife with blade in the form of a bird's head, with short lateral prong above grip, and handle of wood bound with copper wire: Africa, Central Africa, Gabon

Bundle of six lengths of copper trade wire: West Africa, Nigeria, South Eastern State, Uyo and Annang Provinces, Ibibio, Efik and Annang, mid-19th century

Knife with roundish blade of iron and handle of wood bound with copper wire, used as currency: Africa, Central Africa, Democratic Republic of Congo, possibly Bangala people

Sickle with double-edged bird's head blade of iron and wooden handle bound with copper wire: Africa, Northern Africa, Sudan, Bahr-el-Ghazal, Rohl, Azande people

Spark gap transmitter with Morse key and induction coil, part of a demonstration wireless telegraphy set, by George Carette and Co., Nuremburg, Germany, c. 1900

Portable field telegraph station with Morse key, inker, bell, ink bottle and paper tape all housed in oak case, by Ericsson and Co., Stockholm, c. 1880

Receiver, part of a demonstration wireless telegraphy set, by George Carette and Co., Nuremburg, Germany, c. 1900

Coherer, part of a demonstration wireless telegraphy set, by George Carette and Co., Nuremburg, Germany, c. 1900

Morse inker, part of a demonstration wireless telegraphy set, by George Carette and Co., Nuremburg, Germany, c. 1900

Bichromate cell, part of a demonstration wireless telegraphy set, by George Carette and Co., Nuremburg, Germany, c. 1900

Bichromate cell, part of a demonstration wireless telegraphy set, by George Carette and Co., Nuremburg, Germany, c. 1900

Bichromate cell, part of a demonstration wireless telegraphy set, by George Carette and Co., Nuremburg, Germany, c. 1900

Bichromate cell, part of a demonstration wireless telegraphy set, by George Carette and Co., Nuremburg, Germany, c. 1900

Leclanche cell, part of a demonstration wireless telegraphy set, by George Carette and Co., Nuremburg, Germany, c. 1900

Demonstration wireless telegraphy set, by George Carette and Co., Nuremburg, Germany, c. 1900