Conversation so far:
What is Lovecraft Circle?
a group of writers and friends all linked via the immense correspondence of H.P.
Lovecraft.
Who is in the Lovecraft Circle?
like-minded friends.
Did Howard use this circle to advance his career?
encourage them to share stories, utilize each other's invented fictional trappings, and help each other succeed.
Is the Lovecraft Circle responsible for helping him?
CANNOTANSWER.

Question: What else can you tell me about Robert Howard?
Self-contained rewrite: Besides the Lovecraft Circle,What else can you tell me about Robert E. Howard?