Anthony Blunt was an art historian. He specialized in the artist Nicolas Poussin.

DICTIONARY OF ART HISTORIANS
Anthony Blunt: British art historian and spy
Poussin had a secret. And Anthony was trying to figure it out.
Knights Templar Treasure?

The Real Meaning of “Et in Arcadia Ego” and the Underground Stream
Along the way he had some spy problems, because he was a ‘double agent.’ It seems he worked for the Bolsheviks, and the British.
It seems that, “He was lured in by his brilliant, hard-drinking and gay friend Guy Burgess, an Old Etonian…”
and that, “Burgess found [Blunt] easy to manipulate. He had seen in the emotionally stunted Blunt not just a wish to commit himself to anti-fascism, but also an appetite for subversion which, in those days of illegal homosexuality, was keenly whetted.”
Actually, this wasn’t really the case, because the British Bankers and their friends put the Bolsheviks in power. It was just a game to arrange the geopolitical chessboard, and they were all happy together and on the same side; therefore it was a good idea to pretend to those below you that you were a traitor.
Brian Sewell: Soviet double agent Anthony Blunt did no harm to Britain

Was Victor Rothschild A ‘Soviet Agent’?

And most especially if you were a very key figure in international child abuse rings investigations…
Anthony Blunt was also a sadist and allegedly liked to kill children, and therefore was most definitely sought after.
ROTHSCHILD’S FRIEND BLUNT; INTERNATIONAL CHILD ABUSE RING
JIMMY SAVILE; ROTHSCHILD; ANTHONY BLUNT; MI5
There was not much he wouldn’t do, so he was easily compromised by the powers that be.
RELATED:
Holy Blood Holy Grail Holy Crap
The Illuminati Art World
Are Gay Men Easily Compromised?