In 1870-72, John Marius Wilson's Imperial Gazetteer of England and Wales described Shacklewell like this:
SHACKLEWELL, a metropolitan suburb in Hackney, St. John parish, Middlesex; 3 miles N N E of St. Paul's, London. It has a large church, in the Grecian style; and it was the residence of Mrs. Heron, Sir T. More's daughter, and of the Rowes.
GB Historical GIS / University of Portsmouth, History of Shacklewell, in Hackney and Middlesex | Map and description, A Vision of Britain through Time.
Date accessed: 28th March 2017
Click here for more detailed advice on finding places within A Vision of Britain through Time , and maybe some references to other places called " Shacklewell ".