National Railway MuseumThe main works of the L&YR was at Horwich near Bolton. A large number of drawings produced by the Horwich drawing office survive and are housed in the National Railway Museum at York. Individual drawings can normally be viewed by prior arrangement through the Search Engine facility at the NRM. Check the NRM website for opening times and contact details.
The full list of drawings running to over 300 pages can be found using the link below. Please open in a new tab to avoid leaving this site.