Collection of patents and agreements relating to cable insulation developed by Edwin Truman and its use by George Crosland Taylor

Duplicate lince to use letters patent

Specification relating to insulating telegraph conductors

Handwritten note relating to cable insulation

Licence to use patents

Surrender of license

Assignment of letters patent

Specification relating to insulated telegraphic conductors

Specification relating to apparatus used for covering wire with plastic material

Hand written notes relating to the House of Lords enquiry into the loss of the first transatlantic telegraph cable

Copy of a court order

Specification relating to preparing Gutta-Percha for insulating telegraphic conductors