coloured diagrams and symbols are used instead of letters, for the greater ease of Learners', William Pickering, London, 1847 Condition: Loose front cover, has broken away from the main body of the book, damage to spine with some pieces missing to the bottom and to a small section of the top right hand corner of the spine, all pages have foxing/browning, would advise telephone department or viewing in person prior to bidding. **General condition consistent with age