Some problematic Sexton Blakes

I've been posting some bibliographic puzzles here on Pulpetti for some time now. I'm finally getting my book on British crime paperbackers to print (hopefully at the end of the next week), but there are still some things I'd like to be more sure of. I have several Sexton Blakes translated in Finnish in the early sixties for which I haven't been able to find the original publishing info, as I don't have an access to original English stories.

Here's a lowdown, with the Finnish titles translated literally back to English (but do note that the English titles don't match any known Sexton Blake stories):

Edwin Harrison: "The Green Spider" (published in 1963): someone is coming to meet Sexton Blake at his office, but is hit by a car just in front of Blake's building and gets killed.
Edwin Harrison: "Spanish Blood" (1963): a matador is poisoned by syanide.
Anonymous (only Sexton Blake published in Finnish without the author's name): "The Disappeared Author" (1963): the promising writer of a great book gets lost.
Desmond Reid (a house name): "The Avenger from Dartmoor" (1962): the authorities let a a prisoner escape so that he can revenge and take out his former allies who let him down
Desmond Reid: "The Woman Is Dangerous" (1962): takes place in fictional state of Costa Barria, features also Huxton Rymer, but is still clearly from the post-WWII era
Desmond Reid: "The Trumper Killer": a jazz player makes extra money killing people
Desmond Reid: "The Angel of Death": an early story on animal rights movement, some young people are fleeing the circus animals
Jack Trevor Story: "Gold Means Death": Splash Kirby looks into the world of Italian immigrants and is kidnapped and taken to Italy
Jack Trevor Story: "Death Before One's Eyes": now, this is interesting: Blake is a first person narrator (the only time in the history of Sexton Blake?) and is approached by a former lover who asks Blake look into a mystery
Jack Trevor Story: "Love Under the Gallows": Sexton Blake vs. the teenage gangs

And also, is Jack Trevor Story's Invitation to Murder about someone killing models?

Philip Chambers and Sexton Blake

Philip Chambers is a writer almost next nothing is known of. He was born in 1936, is possibly dead by now, wrote six Sexton Blake stories in the early sixties and nothing else. I've skimmed through his Blake story Bullets to Bagdad (1960) in which a secret organization is planning to take over the government in Iraq and take their oil supplies. In the story Blake's boss is and old man called Craille. He's the leader of the British counter-intelligence organization, as secret as the criminal organization in the book.

Here are some of Chambers's Sexton Blake covers. Pretty good ones, too, but I don't know the illustrator. There's a signature in Keep It Secret!, it seems it says "S. Barany".