Identification:
    Object name: letter
    Classification: science and technology
    Classification: heat and light
    Brief Description: Letter to unknown gas company from B Donkin and Company, engineers and iron founders, explaining the necessity of using a specific trade mark for their gas valves, 11th February 1869

Production:
    Date: 11.2.1869
    Organisation:
        Organisation Name: B Donkin and Company

Association:

Object location:  Box 44

Description:
Material: paper
Height: 21.5 cm
Width: 27.5 cm