A Journey through the Tunisian Sahara. Geographical Journal 11(6): 581-608, 1898
A Remarkable Journey Across the Sahara. Science 35(899): 455-456, 1912
A Journey to Lake Chad and the Sahara. Geographical Journal 77(4): 305-320, 1931
A Journey across the Sahara from Kano to Ouarghla. Geographical Journal 71(6): 538-559, 1928
A Journey to Lake Chad and the Sahara: Discussion. Geographical Journal 77(4): 320-322, 1931