Palmer placed two pieces in the April 1930 issue of Ghost Stories, one under his own name, and the other under the name "Stanley Horton." I've been able to get a copy of one article, and I'm working on getting hold of the other. Cross your fingers! But even without having both pieces, I still have some interesting things to share about both of them, with you.
Shelley—The Living Ghost #
Let's start with "Shelley—The Living Ghost," by Stanley Horton, because that's the piece I actually have. I'd been hoping that the Horton piece was another Karl Brandt tale, but alas, it is not. It is a somewhat embellished telling of a couple of anecdotes by the poet Lord Byron, about his friend the poet Percy Bysshe Shelley.
The first anecdote relates how Shelley, while summering on the Mediterranean show, wakes up everyone in the house one night with his terrified cries. When he comes to himself, he tells everyone that he saw a vision of a strange cloaked figure, which lifted up it's hood and said to him, "Siete soddisfatto?" [art thou satisfied?] and vanished. The apparition had Shelley's own face! This happened only a few days before Shelley's tragic death, in a boating accident.
The second anecdote is a vision that Lord Byron himself experienced, of Shelley appearing to him in the woods, when in reality Shelley was nowhere in the vicinity. This also happened not long before Shelley's death.
You can read "Shelley—The Living Ghost" here.
Spooky!
Sources #
The first anecdote appears to be from Thomas Medwin's Life of Shelley (1847). You can read his account of several of Shelley's visions, including this one, here (start with "I heard from my friends, that Shelley had been subject during this Villagiatura[sic], at the Casa Magni, to strange hallucinations..."). Note that in this version of the story, the apparition isn't stated to be Shelley's doppelganger. That detail comes from the Spanish drama that Shelley had been reading, which probably gave him nightmares.
The second anecdote appears to come via Thomas Moore. In his diary entry for June 12, 1828 (it's marked as the 11th, but I think it's a typo), Moore mentions a Mr. Cowell repeating Byron's anecdote of seeing Shelley in the woods, and later discovering that Shelley couldn't have been there. Moore later published a biography/annotated collection of Byron's letters and journals; he repeats the anecdote (as told to Cowell by Byron), just before Letter DIV.
Between Two Worlds #
"Between Two Worlds" is another article in the April 1930 issue of Ghost Stories, credited to Stuart Palmer. I haven't yet gotten a copy of this one—I'm trying, but the world is conspiring against me (and all of us). However, Mike Ashley mentions it in the introduction to his anthology of selections from Ghost Stories, Ashley, Mike. "Spectral Memories,", Phantom Perfumes and Other Shades: Memories of Ghost Stories Magazine, p. xxxi. Ash-Tree Press (2000). Phantom Perfumes. From his description, it's clear that this is the same story as "How Lost Was My Father?" from Fate, July 1953!
I've discussed "How Lost Was My Father?" before, here. It's clearly a reworking of an Ambrose Bierce story, although Palmer implies (and apparently, some people believed) that Bierce's story is based on the event that Palmer's narrator, Sarah Emma Lang, describes. The reality of the tale (e.g, whether someone named David Lang ever owned the farm where this event allegedly took place) was debunked in 2014, by Danielle Eldridge, a reporter for The Tennessean. Unfortunately, that article is paywalled, so I haven't read it. It's mentioned on the Literary Bierce site (scroll about halfway down the page to "Ambrose Bierce and The David Lang Hoax.").
I believe it, though, because (as you will eventually see), someone else managed to debunk another Palmer Fate article (which was also a Ghost Stories article). So apparently, Palmer didn't just embellish his "non-fiction" articles-—sometimes he pretty much just made them up!
Note that I am making a distinction here between the first-person "confessional"-style stories, like "A Sleeper Bewitched," (which are implied to be true, but are in fact fiction), and the third-person articles (like "Shelley—The Living Ghost") which are generally retellings of previously published accounts of supposed supernatural phenomena (so, "non-fiction").
To be fair, the FictionMags index lists "Between Two Worlds" as "by Sarah Emma Lang, as told to Stuart Palmer," so perhaps the tale was meant to be a ("true") story, rather than an article.