These maps were marked up by Smith, Gotthard & Co. Land Agents and Surveyors to show land ownership boundaries (including Ripley's landholdings) and ownership changes. The 1911 maps are marked up to show the Midlands's through railway scheme described in "All Change". Records and papers of Ripley' Dye Works and Ripley's Trustees are held at the West Yorkshire Archive, Wakefield. The WYA site provides an on line index to the collection