The Deposition and the Photograph: Why the Best Cryptid Evidence Is Always a Document

There is a legal document sitting in the Scottish Archives dated October 29, 1811, and it is one of the strangest things I have read in a long time.

John McIsaac, twenty-three years old, tenant's son from a farm called Corphine on the east coast of Kintyre, appeared before Sheriff Substitute Duncan Campbell and swore under oath that two weeks earlier he had crawled on his hands and knees through a field of corn to get closer to something white he had seen on a rock near the sea. He got within twelve to fifteen paces. What he saw, he said, had the upper body of a human and the lower half of something scaled and brindled, reddish-grey, with a tail that ended in greenish-red. It was lying on its belly facing the water. The wind came off the land and kept lifting its hair, and each time the wind did this, the creature reached up with one hand and smoothed the hair back down.

That detail — the hand smoothing the hair — is the sentence that stops me. Not because it proves anything. Because it doesn't read like invention. It reads like the thing a person would notice when they are lying very still behind a rock, barely breathing, watching something they cannot explain.

The document is a formal legal deposition. McIsaac didn't write it himself; it was transcribed by a court officer in the presence of a sheriff. The format was designed for property disputes and criminal matters. It was not designed for this. And yet here it is, preserved in an archive, with the sheriff's signature at the bottom. Duncan Campbell, Sheriff Substitute, apparently decided this testimony was worth recording in the official manner.

I keep thinking about what that decision cost Campbell. He was a legal officer of the Crown. He had a reputation to maintain. He signed his name to a document asserting that a man had appeared before him and sworn under oath that he had seen a mermaid. Whatever Campbell privately believed, he apparently concluded that McIsaac's account deserved the formal weight of a deposition rather than dismissal. That is a choice worth sitting with.

This is what I find genuinely interesting about the cryptid archive, and it is not what the headlines are usually about.

The headlines this week are about a green mass in Loch Ness photographed near a tourist boat, and an eight-foot figure seen near Shaver Lake in California, and a crocodile in Tuscany that may or may not exist. These stories follow a familiar rhythm: sighting, photograph, speculation, brief media cycle, dissolution. The Nessie sighting register now has seven entries for 2026. The BFRO has classified the Shaver Lake report as Class A, their highest credibility tier. A Rhode Island man who saw something near a Connecticut state forest says he is no longer a skeptic.

I am not dismissing any of this. But these contemporary reports will not survive in the way the McIsaac deposition has survived. They will live in databases maintained by enthusiast organizations and in cached news articles that may or may not be accessible in fifty years. They have no institutional weight behind them. Nobody is signing their name to them in front of a legal officer.

The 1811 document survived because it was filed in a system designed to persist. The 1934 Loch Ness photographs survive — some of them — because they were submitted to publications and archived imperfectly, a record that the Loch Ness Project has spent decades reconstructing. The 1734 Egede account of a sea monster off Greenland survives because Hans Egede was a missionary and colonial administrator who kept meticulous records, and because subsequent researchers have had enough material to run serious morphological analysis on (the current best interpretation involves whale behavior and anatomy, which is not as deflating as it sounds — Egede saw something real, the question is what).

What the cryptid archive actually is, when you look at it whole, is a record of what bureaucratic and institutional systems chose to preserve. The sheriff signed McIsaac's deposition. Glanvill investigated the Drummer of Tedworth for the Royal Society. These things survived because they got inside institutional containers.

The genetic work is interesting in exactly this way. When Bryan Sykes and his colleagues ran mitochondrial sequencing on thirty hair samples attributed to anomalous primates, they were doing something the encounter tradition had never been able to do before: running the physical residue of claimed sightings through a methodology with clear standards and preserved outputs. Most of the samples came back as known species. Two Himalayan samples matched a Palaeolithic polar bear lineage. That result — reported in 2014, extended in 2017 with better phylogenetic resolution — is genuinely strange. It suggests the Himalayan 'yeti' tradition may be tracking a real anomalous bear population, a relict lineage that diverged early and has been living in a region where it wasn't supposed to be. This is not Bigfoot-is-real. It is something more interesting: the encounter tradition preserved a signal about a real biological anomaly that formal science hadn't documented.

The trickster animal research points in a related direction. The biogeographic distribution of which animals appear as tricksters in folklore tracks the actual distribution of those animals in the real world. Folklore, it turns out, is constrained by ecology. The stories go where the animals go. This seems obvious once stated, but it has a significant implication: the encounter tradition is not free-floating mythology. It is, at least partially, downstream of real contact with real animals in real places.

None of this resolves the question of what John McIsaac saw on that rock in October 1811. Seals are the conventional explanation for mermaid sightings, and seals can behave strangely, and a young man lying in a cornfield at fifteen paces might have misperceived the situation. But seals do not have hands. They do not smooth their hair in the wind. McIsaac's description includes that specific, repeated, deliberate gesture, and I have not found a satisfying account of how a seal produces it.

What I find myself left with is this: the encounter tradition is a long record of people deciding that what they saw was worth reporting, and a shorter record of institutions deciding that those reports were worth preserving. The gap between those two populations — the reported and the preserved — is where most of the interesting questions live. McIsaac's deposition survived. Miss Eliza Mackay's 1809 letter from Sandside Bay survived, a schoolteacher's account of watching something with green hair and a young woman's face in the water for over an hour. These survived because they entered systems with enough institutional gravity to hold them.

The green mass near Urquhart Castle this July will almost certainly not be examined with the same care in 2226. It will either become a data point in a sightings register that may or may not still exist, or it will be forgotten. This is not a criticism of the people who reported it. It is a description of how the archive works.

The question that interests me, sitting here with all of this material, is not whether any of these creatures exist. It is what we are actually preserving when we preserve these accounts, and what we lose when we don't. The McIsaac deposition is evidence of something — at minimum, of a young man's sincere terror and wonder, and of a sheriff who decided that sincere terror and wonder deserved the dignity of a formal record. That seems like enough to be worth keeping.