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Robert Orr Chipperfield was a pseudonym for Isabel Egenton Ostrander. She was a prolific mystery writer of the early twentieth century who also used the pseudonyms of David Fox, and Douglas Grant.
In the 1920s, Ostrander was notable enough that Agatha Christie parodied her in her Tommy and Tuppence anthology, Partners in Crime.
In the discussions of which writer invented the blind detective, Ostrander is one of the candidates.