Occleshaw is pulling his data from a diary by Col. Richard Meinertzhagen whom he tells us right up front on p. 4:
"Meinertzhagen was not always the most reliable of sources, I knew but I was inclined to accept his account because so much of the nornal documentary souce material which I discovered to have been withheld related directly to the trail stemming from the diary entry. That in itself seemed to indicate a consistent thread, which was difficult to explain except in form of the attempted concealment of a rescue operation."
AGRBear
PS Please read Post #2 where Phil's quote tells us what he knows about Meinertzhagen.