It's good that someone has an encyclopedic knowledge of every single thing that Lovecraft wrote which has survived until today (including all the notes, letters, correspondence, essays, etc) and can quickly cross reference them. Apparently he is pretty chummy with other Lovecraft scholars, both amateur and professional, like they can send him random questions like "Did Lovecraft ever express any opinion on this issue or this person", and he'll come back at them with all the citations and shit which is kind of impressive because I think there are still large chunks of the correspondence and essays that were never digitized or indexed in any form.