The Reluctant Shaman
The Hardwood Pile
Nothing in the Rules
The Ghost of Melvin Pye
The Wisdom of the East
Mr. Arson
Ka the Appalling

Original appearances from 1939 to 1958 - 4 from Unknown, 2 from Thrilling Wonder Stories, and 1 from Fantastic Universe. Only one from this set had previously appeared in a de Camp collection: "Mr. Arson" was in the very rare Avalon hardcover collection The Undesired Princess. Three others have appeared in retrospectives - leaving 3 stories which can only be found here. I consider this uncommon, and don't see copies very often.