Prince Farouk Hotel in Siwa Oasis 1920-40 ?

Given the interest in the Prince Farouk Hotel in Siwa in the years between the two world wars I have tried to investigate and find other information but with poor results apart from some other images taken from the film made by Baroness Ullens de Schooten's in 1926 at Siwa.

It seems that in the 1940s the hotel was still in operation as one of the photographs appears in a publication of 1942 but it is not sure (It could be a photo of previous years).

A curious thing to investigate: I also found a Hillier's Hotel in Matruh in the same period.