Hospital Yacht 'Sunbeam' at Dardanelles

[michaeldr]

Lord & Lady Brassey brought their yacht Sunbeam to the Dardanelles and it acted as a hospital yacht. There is mention of it in Hamilton's diary Vol.2, p.105, 14 August 1915.  There is also mention in Wemyss' book at about the same time.

A couple of weeks earlier (Friday 30 July 1915) the Sunbeam appears in a sketch made at Mudros by Herbert Hillier - https://www.iwm.org.uk/collections/item/object/13227

Does anyone have details of exactly when the Sunbeam arrived in the Dardanelles theatre?

Thanks in advance, Michael