Hi, Rusty!
Now I had looked at my (sometimes unreliable ! ) Chambers.........
But of course I looked under "master" - no mention at all of its meaning "demon"!
But yes, I have since checked out "demon" and, as Malone said, Chambers does indicate that it can mean a person of great skill.
However, I checked both in Anne Bradford and she gives neither as meaning the other!!
So???
I know my opinion means nothing in the great scheme of things , but.........I am not happy!
However, diverging..........I like Monet very much and have spent a lot of time in the National Gallery looking at his paintings! and been to several special exhibitions!
Thank you, Malone!
It did not occur to me to reverse the search, and look up "demon"!
I don't like it though!