Collection of three short stories: The Day of the Dirigible, An Eye for Detail, and The Magic Lantern.
'Viola Stewart is a widowed optician with a penchant for detectiving, who stumbles upon a secret Society of Men in Grey. Someone is stalking the women of London. An unexpected encounter puts our heroine in grave peril. Viola is detectiving again, chasing secret societies and nefarious plots.'
Source: Publisher's blurb.