He could hardly leave it without another look,
though the recollection of what he had seen there made him shiver,
even on that bright morning.
You can read it online here and listen to it here:
It has been adapted for tv and radio. This is the 2013 version, adapted by Mark Gatiss:
In 1951, it was adapted as The Lost Will of Dr Rant (with Leslie Nielsen) for the Lights Out mystery series: