 The following year, by then Major and Mrs Speedy spent several months exploring Sudan; his wife published a book about their travels.In 1883–85, Speedy took part in the mission led by Vice-Admiral Sir William Hewett to the court of Emperor Yohannes IV of Ethiopia to negotiate the region's disputed borders.He returned to Ethiopia in 1897 as part of Rennell Rodd, 1st Baron Rennell's mission to the court of King Menelik to negotiate the Anglo-Ethiopian Treaty, which defined the border with Sudan.