Correspondence and related papers concerning the establishment of galvanic communications between the Greenwich and Paris observatories. The papers include extracts from Airy's report on galvanic communications to the Admiralty; the laying of telegraph wires in the grounds of Greenwich Park, illustrated with a plan; the laying of telegraph wires on the South Eastern Railway between London Bridge and Dover; a plan and description of the electric telegraph employed on the South Eastern Railway; proposals by the Submarine Telegraph Company for a link with the continent; trial signals on this telegraph network; and conditions agreed between the Royal Observatory and the South Eastern Railway for the use of the telegraph. The correspondents include J. Glaisher, C.V. Walker, F. Beaufort, C. Wheatstone, C.R. Cockerell and J.W. Brett.