David,
No, not in bed (aside from the weekend lie-in and usual long late breakfast with the Archers), but doing outdoor things in this lovely heatwave. One of the outdoor things I should have done is to photograph a page from the official history, but since Martin is complaining that he can't find the card reader, that would have been a fruitless exercise today anyway. However, I'll do a bit of copytyping and paraphrasing right now.
When you read Collinson-Owen you will come across reference to the 'Y Scheme'. Why it was called this, he doesn't say, but in short a world expert on malaria Sir Ronald Ross paid a couple of visits to Salonika to asses the situation, and the scheme was his.
From the Official History: Military Ops Macedonia vol 2 page 58:
(1917) The problem of malaria had now come to a head. Owing to the abandonment of evacuation by hospital ship in 1917, there had now accumulated some 15,000 chronic cases, "a population which did little but circulate between hospitals and convalescent depots with an occasional day or two of light duty. In Dec 17 Ross sent out to report...he telegraphed on 30 Dec that a minimum of 15,000 be sent home and replaced by drafts, to be completed before 1 May, because after that date the Taranto-Itea route would be highly malarial in Greece and Italy. In his opinion many thousands more required leave or transfer to a healthier front.
The scheme was put into force as fast as shipping from Itea to Taranto could be provided. By end Feb 5,000+ and by end April 9,000+ officers and men suffering chronic and relapsing malaria, or who had been severely affected mentally, nervously or internally by the disease, had been sent home, Owing to the German Spring Offensive the flow of drafts to replace these losses speedily dried up. However, the incidence of malaria declined in 1918, due to improved treatment and greater precautions. The removal of the 15,000 chronic cases may well have been the most important factor in the lowered rate of infection.
This makes no mention of the hospital ships in Salonika Harbour, and I'm sorry it doesn't give any direct answers about your grandfather, however, I hope it sets the scene.
If you want to treat yourself to a book on the Salonika Campaign, why not go for Alan Wakefield (a Pal) and Simon Moody's 'Under the Devil's Eye', to be published next month, but can be ordered now a special pre-publication discount? Alan and Simon relaunched the Salonika Camapign Society, which is invaluable if you are interested in that theatre. If you are not a member already, take a look at
http://www.salonika.freeserve.co.uk/I am always happy to talk Salonika (not that I know much) so if there is anything you would like looking up from my book collection here, just ask.