2017: Little Ventured: Little Gained: Dee Navigation Improvement Plans 1836-54 : David Parry. The Patent Slip and Associated Buildings at Ellesmere Port: Hannah Holmes. Steam on the Weaver Navigation: Terry Kavanagh. Holt Abbott - a pioneer in canal cruiser design and hire boat operation: David Brown and Angela Clark. Tilbury - A correction from Richard Thomas. John Wilkinson, his role in the ore trade: Peter Sandbach.