In addition, for those who read French, I would like to recommend an exceptional work by Ronald Creagh and Christophe Deschler, who edited new Elisée Reclus's correspondence: Élisée Reclus, Lettres à Clarisse, Paris, Classiques Garnier, 2018 https://classiques-garnier.com/lettres-a-clarisse.html
2018 [with B. Viotto Pedrosa]: “Inventing critical development: a Brazilian geographer and his Northern networks”, Transactions of the Institute of British Geographers early view https://onlinelibrary.wiley.com/doi/full/10.1111/tran.12241