[1] He became a watchmaker, then found work with Siemens in their factory for telegraphic equipment in Woolwich, in southeast London, England.

[3] On his journey to Khartoum Giegler visited almost all the known monuments from ancient Egyptian times, wanting "to see the magnificent and sublime remains of a vanished cultural epoch".

He spent two days in Luxor, and later visited Philae and Abu Simbel, and the pyramids of Nuri and Jebel Barkal in June 1873.

[2] In 1874 Giegler made an inspection tour of the telegraph line to the north, and on his way back visited the ruins of Meroë.

[1] Giegler avoided the temptations that Khartoum had to offer, did not participate in illegal trade and political intrigue, did his work and invested his earnings.

[3] In 1876 Wilhelm Junker, the German-Russian explorer, passed through Khartoum where he met Giegler at the house of the Austrian consul Martin Hansel.

[8] After Rauf had failed to defeat the Mahdi on Aba Island, Giegler wrote, The right thing to do would have been to ignore the whole matter.

[10] After taking office he sent a telegram to Cairo in which he said that the forces at his disposal were easily enough to handle the Mahdist revolt, and he did not require reinforcements.

[8] He sent Yusuf Pasha Hasan al-Shallili, governor of Sennar, to attack Jabal Qadir with a force of 3,000 men.

He wrote that Giacomo Messedaglia was "a rascal and a knave ... a crook to the end", while Romolo Gessi was "capable of the worst and basest actions".