most of Lovecraft's work share references from occultism and history of religion, the questions are an addition (I believe if I would change something maybe the info in the story button would be a collectible item, so it wouldn't look something you should guess as a file).
The original story is about an Anglican priest who is forsaken by banished books that were persecuted by the modern inquisition, in the original tale there is this hut, the man becoming the Anglican priest and gazing this apparitions in the mirror, also the weird flashlight with the purple glow.
The ID inside the lake is with the name of a character of another Lovecraft's tale, Asenath Waite which was the former witch wife of Derby Pickman, character that named the Derby Pickman Foundation which is mentioned in another tale called at the mountains of madness.
Her image is a reference of another woman called Lady Frieda Harris, which illustrated the Tarot of Thoth made by Aleister Crowley since Waite is a reference to a family of one of "Crowley's rivals", who else invented one of the most famous tarot decks.
Another references such as the Arkham Advertiser can be found in another short tales from Lovecraft 's works.