author
1855–1895
Best known for a practical guide to punctuation that still attracts curious readers today, this late-Victorian writer published under a pen name while also building a career in law.
Paul Allardyce was the pen name of George Paul Macdonell (1855–1895), a British barrister-at-law of Lincoln's Inn and writer. He is most closely associated with Stops; Or, How to Punctuate, a compact handbook for writers and students that has remained his best-known work.
Sources available during this search also identify him as a contributor to the Dictionary of National Biography. Contemporary memorial and obituary material suggests he was well regarded by friends and colleagues, and that his death in 1895 came suddenly after a short illness.
Reliable image sources were limited in this search, and I couldn't confirm a suitable portrait from the pages retrieved.