In August 1835, New York’s Sun published supposed astronomical discoveries attributed to John Herschel’s observatory at the Cape of Good Hope. Readers encountered an inhabited Moon, extraordinary animals and winged human-like beings, presented through the language of scientific reporting. The Great Moon Hoax is a case of invented discovery: the surviving text and illustrations document the story’s publication, not life observed on the lunar surface.
Reading an 1835 story through an 1859 edition
An accessible source is William Gowans’s 1859 New York edition, The Moon Hoax; or, A Discovery that the Moon Has a Vast Population of Human Beings, attributed on its title page to Richard Adams Locke. That edition reproduces the purported discoveries and a selection of press responses. It is a later reprint, not an original daily issue of the newspaper, and its publisher’s advertisement supplies another layer of retrospective commentary.
The text begins under the grand title of astronomical discoveries at the Cape, claims derivation from a supplement to the Edinburgh Journal of Science, and invokes the reputation of Herschel and the Royal Society. A supposed associate, Andrew Grant, provides the channel through which privileged information reaches the reader. The narrative offers explanations for why its own account can precede the fuller scientific publication. Its references to correspondence, drawings and future volumes create a documentary setting inside the fiction.
The Library of Congress’s account dates the newspaper sequence to the week beginning 25 August, with the last instalment on 31 August 1835. Its discussion identifies Grant as fictitious and distinguishes the real Herschel expedition from the invented apparatus and discoveries. The 1859 reprint’s broader heading refers to publication in August and September, and includes a Sun response dated 1 September. Those dates describe publication and commentary, not verified nights of lunar observation.
An instrument built out of precise-sounding details
Before presenting creatures, the story devotes considerable space to the telescope. It proposes overcoming the dimness of highly magnified images by combining astronomical optics with a hydro-oxygen microscope. The account stages a conversation between Herschel and David Brewster, then introduces royal patronage, a large budget, glass casting and a difficult installation. This progression makes the eventual marvel depend on a supposedly explained technical achievement.
The invented lens is twenty-four feet across, weighs nearly seven tons after polishing and is assigned a magnification of 42,000 times. The story gives failed and successful casting dates, describes flaws at the edge of the glass and explains how a mounting would conceal them. None of these details becomes a verified engineering record simply by being exact. Their function within the narrative is to give the reader a mechanism that appears capable of producing the later observations.
The alleged image is projected onto a large viewing surface, allowing several observers to inspect it together. Lenses identified by letters can be exchanged to alter the apparent distance, while tracking machinery keeps small features in view. This supplies a recurring explanation for how the narrators can move between landscapes and close views of animals. The reader is repeatedly invited to trust the instrument before assessing the astonishing scenes it supposedly reveals.
From familiar rocks to an inhabited Moon
The reported survey begins with basalt-like columns, red flowers, woodland, beaches and expanses of water. The language relies on comparisons with things an earthly reader might recognise: churchyard yews, firs, marble, gypsum and coastal cliffs. A question about whether pale objects are shells or merely rounded stones introduces disagreement between the fictional observers. Even uncertainty is built into the account, making it resemble a field report rather than an uninterrupted list of wonders.
Later scenery becomes more extravagant. Crystal formations, richly coloured shores and enormous geological structures are described with measurements and familiar place comparisons. These passages establish the Moon as a landscape that can be explored, classified and named. The narrative then moves from vegetation and terrain towards animals and beings whose apparent intelligence promises an even greater discovery.
The winged beings appear in groups descending from cliffs and walking towards woodland. The story supplies counts for three parties, an average height, hair colour, facial details and an account of folded wings. Changing the lens supposedly permits a closer inspection. Their movements are interpreted as conversation, and their anatomy is given the scientific-sounding designation Vespertilio-homo. The label belongs to the fabricated account; it is not an accepted zoological identification.
The narrative also moves from described behaviour to speculation about civilisation. A blue-stone temple with columns, a metallic roof and a globe surrounded by flame-like forms becomes a puzzle about worship, science or remembered catastrophe. The narrators admit they have not seen its builders at work. This preserves an unanswered question while suggesting that more important disclosures are still to come. It is a recognisable promise of future evidence, made within a story whose observational foundation is invented.
The accident that interrupts the discoveries
Near the close of the lunar survey, the account supplies a practical obstacle to further observation. The great lens has been left in a position that concentrates sunlight into the observatory. A fire damages the viewing chamber, its screen and reflectors. Repairs take about a week, by which time the Moon can no longer be examined during that observing period, so attention turns to the planets.
This is part of the story’s conclusion, rather than a documented observatory accident supporting its truth. The same instrument that supposedly made the discoveries now explains the interruption. The account can therefore end without presenting independent specimens, a reproducible demonstration of its claimed views or an opportunity for readers to inspect the supposed lunar inhabitants.
A press controversy, not universal belief
The closing press section in the 1859 edition is particularly revealing. A Sun statement dated 1 September treats sceptical rivals as incapable of appreciating scientific progress, then offers favourable extracts from other newspapers. Some praise the account’s plausibility or literary skill; others reserve judgment. The Philadelphia Inquirer extract says readers can decide after reading the whole story. This is not the same as an unequivocal endorsement.
An Evening Post passage compares the winged inhabitants with the fictional people in Peter Wilkins. Its comic register warns against treating every reproduced response as a literal declaration of belief. Moreover, the selection is presented by the newspaper defending its own story and reproduced in a later book. It cannot be treated as a complete, neutral survey of what the public thought.
Gowans’s advertisement, dated 1 August 1859, claims that the newspaper’s circulation rose fivefold and that sixty thousand pamphlet copies sold in under a month. Those are the later publisher’s claims, not audited figures established by this article. His description of collectors seeking scarce copies is useful evidence of how the story was marketed and remembered decades after the original publication.
What the print and the location establish
The accompanying lithograph shows the fantasy’s winged beings and animals as an imagined landscape. Its sheet bears an 1835 copyright statement, and the Library of Congress catalogue identifies Benjamin Henry Day as copyright claimant. That role should not automatically be converted into a named artist attribution. The image is a historical product associated with the story, not a picture made through Herschel’s telescope.
The map pin is an approximate Manhattan borough reference, rounded from the U.S. Census Gazetteer. It locates the New York publishing case broadly, not a particular newspaper office. It does not locate an astronomical discovery, a Cape observatory or a place on the Moon.
The principal text consulted is Gowans’s 1859 edition, digitised by Project Gutenberg, particularly the publisher’s advertisement, the telescope account, lunar survey and closing press extracts. The Library of Congress’s “Belief, Legend, and the Great Moon Hoax” provides the publication chronology and distinguishes the fictional report from the real expedition. The illustration is LCCN 2003665049; the geographical reference is the 2025 Census county-subdivision Gazetteer. Sources checked 10 November 2026.
For another New York case involving a disputed manufactured discovery, see the Cardiff Giant.