Working independently and with little other information other than what they themselves had observed, Watson and Farey disagreed considerably over the details of the geological structure of Derbyshire, and Watson correctly realised that the Derbyshire mountain landscapes were caused by underground volcanic action as opposed to Farey's assertion that they were formed by "satellite attraction from above".
Bekerja sendiri-sendiri dan dengan sedikit informasi dari yang lain selain yang mereka masing-masing amati sendiri, Watson dan Farey sangat tidak setuju pada detail struktur geologi Derbyshire, dan Watson menyadari dengan benar bahwa lanskap pegunungan Derbyshire disebabkan oleh kegiatan vulkanis bawah tanah sedangkan pendapat Farrey bahwa lanskap terbentuk oleh "tarikan satelit di atasnya".