I have just reread "The Dutch Shoe Mystery" (in Swedish translation) in my ongoing task of revisiting all the Queen books in chronological/published order, which I started on new years eve 2008 with "Roman Hat". (I skipped "The French Powder Mystery" since I translated it to Swedish some years ago and know that book fairly well).
"The Dutch Shoe Mystery" was one of my first EQ books I ever read, probably in 1977 or 1978 and I didn't remember much of it. Of course I recalled that it took place in a hospital, but that was just about all.
As with "Roman Hat" I found "Dutch Shoe" quite fast moving and easily read, even though it almost never leave the hospital. I read somewhere else that there is a list of characters and a map over the hospital in the English original, but they are unfortunately missing in the Swedish edition.
As often the killer's identity is somewhat of a disappointment.
Over all I find this a better book than "French Powder". The plot is somewhat "smaller" and therefore more believable. The clues are certainly presented (as we discussed earlier) more fair to the reader than those in "Roman Hat".