Chandler - Giesecke was a German ivory trader who in 1880 [wrong] was killed by an African at Tabora, Tanganyika in a dispute over money. The Germans hanged an Arab [Mohammed bin Kassem] (purportedly the wrong man), causing Siki, the chief of the Wanyamwezi to revolt and plunder the German stores in the town.

Watt - 1885 - sent out to Africa by a Hamburg firm to purchase ivory. Shown the light by Rev. Stuart Watt. He was murdered a few months later near Tabora while lying in his tent.

Abstract of 'Why was Giesecke killed' in Cultures et developpemen, vol 8, no 4, pp 646-665 On 26 September 1886, Hermann Giesecke, a German trader, was shot and mortally wounded at Tippu Tip's tembe on the outskirts of Tabora (central Tanzania). An Arab, Mohammed bin Kassem, was held responsible and eventually hung. At the time, the Germans profited politically from the crime but most other Europeans believed the main, if not the only motive for the murder was the Arabs' fear that their middle-man monopoly of the ivory trade would be broken. East African historians have also assumed on the whole that why Giesecke was killed is less problematic than who did so, for apart from Mohammed bin Kaasem, the local chief Sike was suspected too. Though a re-examination of the who-dun-it would, no doubt, intrigue the readers of historical glossies, this article purposes to show that the 'why' is more worthy of a scholarly audience's attention. Sections: The Tabora Muslims and the earliest European traders - How Giesecke was killed -Sike and the Wasambo - Mohammed bin Kassem and the fanatical Islamic fringe. Notes.