Part of Lovecraft’s Investigators and Their Guns.
(set in 1927-1928, written in 1931, published in 1936)
During the winter of 1927-28 officials of the Federal government made a strange and secret investigation of certain conditions in the ancient Massachusetts seaport of Innsmouth. The public first learned of it in February, when a vast series of raids and arrests occurred, followed by the deliberate burning and dynamiting – under suitable precautions – of an enormous number of crumbling, worm-eaten, and supposedly empty houses along the abandoned waterfront … Only one paper – a tabloid always discounted because of its wild policy – mentioned the deep diving submarine that discharged torpedoes downward in the marine abyss just beyond Devil Reef.
While college student Robert Olmstead was not armed, he had a “handy three-in-one device including a screwdriver” on his key-ring. Lovecraft probably meant a flat combination tool that primarily serves as a bottle opener/cap lifter, but also has a flat screwdriver blade. These were common at the time. Alternatively he could mean a miniature pocket knife that would attach to a key-ring. Contemporary patterns usually had three blades; a bottle opener, a flat screwdriver, and a pen knife. The latter had a very short blade around 2.5-cm (1”) long that was intended for sharpening pencils and would be completely useless as a weapon.