[citation needed] Coincidentally, B-P was also there with the army, and later his brother Francis Baden-Powell would marry Gertrude's youngest sister Florence.

During his travels, Grogan had been stalked by lions, hippos, and crocodiles, pursued by headhunters and cannibals, plagued by parasites and fevers.

In October 1914 Grogan traversed part of German East Africa to Kivu where he met his old friend the Belgian Josué Henry [fr].

[8] Grogan then began to look for further business opportunities including the potential of developing commercial logging near the Mau summit and for cattle grazing on the Uasin Gishu plateau.

[9] Grogan continued to expand his business interests in Kenya both before and after the First World War, as well as completing the railway line to his logging concession.

Grogan, seeking a fitting memorial for his wife, founded the Gertrude's Garden Children's Hospital[11] of which there are now seven in present-day Nairobi.

[13] Grogan had intended his Jipe Estate to be used as an agricultural college for Africans, offering it to the colonial government but never receiving a reply.

Grogan kept abreast of politics in the colony during the struggle for independence, lunching on several occasions with Tom Mboya at the Torrs Hotel and proclaiming him a 'very remarkable young African'.

In his later years Grogan lived with companion Camilla Towers at his house in Taveta, Kenya, until his death in South Africa at the age of 92.