James Collins Furness was educated at High Wycombe Royal Grammar School.
Evidence for this may be found at this website - http://www.buckinghamshireremembers.org.uk/gateway.php?page=- 260 - and there is also a photo of him there. His name appears on the WW1 memorial at High Wycombe Royal Grammar School.
There is also evidence for his birth and residence in 1881, 1891 and 1901 on ancestry.com