Baldock trials
 

Journal of The Royal Agric. Society 1910 gives 20 page account of trials at Manor Farm, Bygrave, Baldock in August 1910.
Entries with photographs of McLaren 5 ton compound steam agric motor, Mann's steam agric tractor, Wallis and Stevens steam compound tractor, Ivel Agric motor (2), Saunderson universal oil motor (2).
Listed on e-bay at 141574788767