A draft programme for the 1869 conference is available, and registration is open. Please check out the conference website and make sure you register for what looks like a fantastic programme, including some amazing keynotes and invited speakers.
Also of interest is a CFP for a February 2020 event at the University of Manchester on Colonial Knowledges: Environment and Logistics in the Creation of Knowledge in British Colonies from 1750 to 1950. Check out the Call for Papers here. Abstracts are due 23 August.