the map, better than tables, can show the progress and victim density of the disease, following the example set by Heinrich Berghaus in his Physikalischer Atlas, Band II, Abt. VIII, no. 2 (1847). These were later followed by Keith Johnston in the second edition of The physical atlas of natural phenomena (1856). Maps in the Journal (Proceedings) of the Royal Geographical Society can be viewed through JSTOR. Petermanns geographische Mitteilungen (PGM) See footnote Start-up of the journal "From the early 1850s Petermann maintained private and business contacts with the two Gotha publishers Wilhelm and Bernhardt Perthes, and in June 1853 he actually spent a short time in Gotha.". Financial difficulties and several other factors prompted him to accept the Perthes' offer of work in 1854. Early in his German career here Petermann was appointed first professor (1854) and later honorary doctor (1855) of the University of Göttingen by the Duke of Gotha. Bernhardt Perthes hired him with the prospect of playing an important role in the establishment of his geographical institute. At the same time his friend Henry Lange also started to work with Perthes. When he was refused a position equal to Petermann he left Perthes and started to work for Brockhaus in Leipzig. When Petermann went to the Gotha Institute part of the original plan was that he would revive the Geographisches Jahrbuch (Geographical Yearbook), which Heinrich Berghaus had edited from 1850 to 1852. At the suggestion of the manager Adolf Müller (1820–1880) it was decided instead to publish the monthly Mittheilungen aus Justus Perthes Geographischer Anstalt über wichtige neue Erforschungen auf dem Gesamtgebiet der Geographie von Dr. A. Petermann (PGM) (Communications from the Justus Perthes Geographical Institute concerning important new studies in the whole field of geography, by Dr. A. Petermann). These were to be published in 'casual issues'. Their relation to several of the Perthes atlases was plainly expounded in the preface to the first issue of 1855: "Our 'Communications' will differ from all similar publications in that they will summarise and graphically illustrate the results of new geographic explorations in precisely executed and carefully detailed maps. Every issue of our periodical will therefore include one or more map supplements, and their design will guarantee a continuous and easily accessible supplement in easy-to-manage form with special regard for those who own Stielers Hand-Atlas, Berghaus's Physical Atlas, and other map publications of the (Perthes) Institute. We will