* CompleteMonster: Mr. Abney from "Lost Hearts" ([[http://www.curculio.org/mrj/GSA2.html link]]) is a seemingly [[BitchInSheepsClothing avuncular]] and [[FauxAffablyEvil kindly]] caretaker who takes in his orphaned 11-year-old cousin Stephen. Stephen soon notices the ghosts of a little Gypsy girl and a young Italian boy prowling the grounds, and it is revealed Abney himself is an occultist who wishes to achieve great power. To this end, Abney takes in children and once they hit a certain age, he cuts out and [[ImAHumanitarian consumes their hearts]] which also condemns them to fate as lonely specters. Stephen is his next intended victim, and Abney uses his own journals to gloat over [[AboveGoodAndEvil how ridiculous the concept that human justice can apply to him is]], seeing nothing wrong with [[WouldHurtAChild sacrificing children]] for [[PoweredByAForsakenChild his own benefit]].
* FairForItsDay: While some of James' stories contain anti-Catholic stereotypes, he is generally quite a bit gentler towards Catholicism than other Gothic writers tend to be. "Oh Whistle and I'll Come to You My Lad" wryly mocks strident anti-Catholics in the person of Colonel Wilson, and Catholicism gets a generally sympathetic portrayal in "Canon Alberic's Scrap-Book"; the French Catholic supporting characters all go to considerable lengths to try and ensure the safety of the protagonist from whatever is stalking the Cathedral, and the titular Canon, though long dead by the events of the story, is treated with remarkable sympathy as someone who probably met an extremely grim fate he did nothing to deserve. The protagonist, Dennistoun, is Protestant, but he goes to considerable expense to arrange Masses for the repose of the Canon's soul at the end of the story.
* NightmareFuel: Made more effective by James' leaving a lot of room for imagination.
** Interestingly, he did not use this tactic in [[EarlyInstallmentWeirdness "Canon Alberic's Scrap-Book,"]] whose climax is laid out in almost loving detail. [[spoiler:"Pale, dusky skin, covering nothing but bones and tendons of appalling strength; coarse black hairs, longer than ever grew on a human hand; nails rising from the ends of the fingers and curving sharply down and forward, gray, hony and wrinkled. [Dennistoun] flew out of his chair with deadly, inconceivable terror clutching at his heart. The shape, whose left hand rested on the table, was rising to a standing posture behind his seat, its right hand crooked above his scalp. There was black and tattered drapery about it; the coarse hair covered it as in the drawing. The lower jaw was thin—what can I call it?—shallow, like a beast's; teeth showed behind the black lips; there was no nose; the eyes, of a fiery yellow, against which the pupils showed black and intense, and the exulting hate and thirst to destroy life which shone there, were the most horrifying feature in the whole vision. There was intelligence of a kind in them—intelligence beyond that of a beast, below that of a man."]]
** The climax of "The Treasure of Abbot Thomas," where Somerton [[spoiler:has a traumatising encounter with a SealedEvilInACan, in pitch darkness at the bottom of a well]]. Creator/RamseyCampbell (yes, [[CampbellCountry that Campbell]]) [[https://www.reddit.com/r/horrorlit/comments/15yd6wp/comment/jxdnzo5/ has named this]] as a particularly haunting moment in horror literature.
** In "The Ash-Tree", several people are killed in their sleep by [[spoiler:a swarm of giant, venomous spiders]] and found with black, putrified skin in the morning.
** In "Count Magnus", the count's demonic familiar is a tentacled monstrosity that sucks the flesh from its victims' bones in a way that leaves their bodies [[FacialHorror with no discernible face]]. [[spoiler:The unfortunate protagonist, Mr. Wraxall, is found in this state at the end of the story]].
* SpiritualSuccessor: Many of Creator/JohnBellairs' works (e.g., ''The House With a Clock in Its Walls'') can be summarized as "M.R. James stories, transported to 1950s America." Haunted artifacts, religious horror, and allusions to real-world history are pervasive themes in both authors' stories, and Bellairs appears to make some deliberate Shout-Outs to authors like James.
* ValuesDissonance: James' portrayal of "lower-class" characters is usually patronizing at best. Although several such characters are shown to hold [[HauntedHouseHistorian local knowledge]] that saves the day, or that James' tweedy protagonists ignore to their peril, they're still written as being uncouth or less innately intelligent, and their experiences and points of view are often glossed over. Interestingly, though, this is less of an issue in some of the stories set abroad (e.g. "Count Magnus" or "Canon Alberic's Scrap-book").