Short story collections

1930's

1934:

Parker Pyne Investigates 1934 (British domestic edition) and British export edition¹ [+ AO]
Published in the US later the same year under the title Mr. Parker Pyne Detective.

1939:

The Regatta Mystery and Other Stories 1939 (American short story collection)²

¹ Parker Pyne figures in ALL of the short stories.

² Parker Pyne figures in TWO of the short stories.