City of London Yeomanry (Rough Riders)
- Maintained by: IWPP Custodial Account
- Originally Created by: International Wargraves Photography Project
- Added: 15 Feb 2008
- Find A Grave Memorial 24646584
Find A Grave, database and images (https://www.findagrave.com : accessed ), memorial page for Major Frederick Roger Knollys (unknown–24 Sep 1915), Find A Grave Memorial no. 24646584, citing Highgate Cemetery (East), Highgate, London Borough of Camden, Greater London, England ; Maintained by IWPP Custodial Account (contributor 48586138) .