Who is Professor Skridlov from Meetings with Remarkable Men and what is their importance?

Professor Skridlov first employs Gurdjieff as a guide in Egypt. They later share their interest in ancient ruins, artifacts, and wisdom by excavating a tomb together. During this time they become good friends. They journey to the source of the Nile River together, and from there eventually to the ruins of Babylon. They go on many expeditions together over the years, and on one they decide to disguise themselves as holy men. While on the expedition and in disguise, the meet Father Giovanni, who lives in a monastery for the World Brotherhood, a group of men who seek faith. Father Giovanni imparts so much wisdom to Professor Skridlov and Gurdjieff that the two men abandon their expedition.