His father was Georg Josef Teodor Gleerup, a photographer in Chicago and then in Lund, and his mother was Wendela Sofia Hallström.

[2] They arrived at Equateur Station, where Alphonse van Gèle handed over command to Casman in a ceremony before the native chiefs.

Well before reaching the Aruwimi River he noticed that the local people had been terrorized by a recent attack by the Arabs against the Basokos.

Later that day Tippo-Tip himself visited Van Gèle and assured him he wanted cordial relations with the Europeans and would stop hunting for slaves.

[1] After the end of his term of service, Gleerup accepted an offer to travel east to Zanzibar under the protection of the Arab chief.

; Pagels Georg (1887–1888), Tre år i Kongo: Skildringar (Three years in the Congo: Descriptions), Stockholm: P. A. Norstedt & S:r.