Letter from Sir Marc Isambard Brunel to Monsieur Lees

The letter outlines the difficulties encountered with water, fire and foul air in building the Thames Tunnel. It also gives news of Isambard Kingdom Brunel who was ill after an accident. Marc states that he, himself is well and active in spite of being 69 years old and attributes his longevity to 'very moderate eating and drinking still more moderate'.