The play was first published in November 1928, by Doubleday, Doran & Company. The UK edition came out later in February 1929. So, strictly speaking, the US edition is the first edition. This is also the first play published after the merger…
The true first is the UK edition published by Heinemann in 1907. For some reason the price is sky high for this lesser work.
The novel was based on the play in the same name, written in 1899 (Stott 50).
An interesting fact that I got from the seller…