Isabel Ostrander

Isabel Egenton Ostrander (1883–1924) was an American mystery writer of the early twentieth century who used her own name and the pseudonyms Robert Orr Chipperfield, David Fox, and Douglas Grant.

[1] She was born in New York City to Thomas E Ostrander and Harriet Elizabeth Bradbrook.

For example, blind detective Thornley Colton appeared in some short stories in People's Ideal Fiction Magazine in early 1913 that weren't collected in book form until 1915, while Max Carrados by Ernest Bramah reached the periodicals in 1913, but anthologization in 1914.

In the 1920s, Ostrander was notable enough that Agatha Christie parodied her in her Tommy and Tuppence anthology, Partners in Crime.

We find Tommy and Tuppence modeling their detective skills after Ostrander's characters, McCarty and Riordan.