author
1827–1878
A Victorian clergyman who served St. Thomas's in Islington and left behind at least one published work, The Numbering of the People. The surviving record is slim, but it places him in mid-19th-century church life in London.

by Islington) George (Vicar of St. Thomas's Allen
George Allen was an English clergyman associated with St. Thomas's, Islington. A Project Gutenberg record for The Numbering of the People identifies him as writing from Upper Barnsbury Street, Islington, in April 1861 and signing himself as a minister.
The details that can be confirmed from the available sources are limited, so a full life sketch would risk guessing. Based on the information found, he appears to have been active in parish ministry in Islington during the Victorian period and is connected with St. Thomas's there.
I wasn't able to confirm a reliable portrait image from the sources located in this search, so no author photo is included here.