Rob Bradshaw continues to do a tremendous work by making available public domain articles for access on the internet. He has recently added the first twenty volumes of the Journal of Theological Studies, which includes this article on Hebrews:
Selwyn, E. C. "On ΨΗΛΑΦΩΜΕΝΩ in Heb. XII 18." Journal of Theological Studies 12.45 (Oct 1910): 133–34.
Naturally, I have added a link to this article on my Articles page. I will continue to add new links to articles as I become aware of them.