Many accurate 1921 census transcriptions have already been added to the pub history site, including London, and parts of Middlesex. If you can contribute to the site, send me some details to Kevan, along with some description of the specific property.
Clerkenwell pub history index
This pub is listed as being on the corner of Clerkenwell Green in the insurance records. *
Historical London public houses, Taverns, Inns, Beer Houses and Hotels.
Residents at this address.
1807/Morrice Dalton/victualler/../../Sun Fire Office records held at the
London Metropolitan Archives *
1809/Morris Dalton/victualler/../../Sun Fire Office records held at the
London Metropolitan Archives *
* Provided By Ewan