Correspondence written at the London & North Western Railway (Northern division) Engine works at Crewe, from J. Trevithick to S. B. Worthington informing him he is sending him a list of the ‘Engines concocted ed’. The letter is attached to a note probably written by Trevithick (the handwriting is similar to that style used in the letter to Worthington), describing how S. B. Worthington and J. Trevithick fitted six of the fifteen engines to be used for the Lancaster & Carlisle Railway