Photograph:Jack Parkinson Collection/Online Transport Archive. Reproduced in Narrow Boat Magazine Spring 2019
Ian and Lucy are between Marsworth Locks 41 and 42 and give a good view of the hard work needed to get both boats around the turns. We can see how Rose Whitlock on Lucy uses the running block method of towing with the line held fast on a large T stud bolted on the caboin roof next to the slide.