Adapted from 'The Wonder Book of Railways for Boys and Girls', (c. 1922). Outlining the system of lamps and discs used on the front of locomotives to identify trains, the book (published before the 1923 railway company amalgamations) explains that ‘every railway has its own system of head codes but there are nine which are used by nearly all with the same meaning’. 170mm x 120mm (6 3/4" x 4 3/4"). Blank inside. Individually wrapped in a compostable bag with a 120gsm recycled kraft envelope. Printed with vegetable-based inks on a carbon neutral press using responsibly sourced, 300gsm Italian paper.