The Secret of the Old Mill: A Hardy Mystery

Work the counterfeit-money case Frank and Joe Hardy worked in 1927 — the bad five at the station, the strangers who took over Turner's mill, the boy nobody was looking after — from the original text, not the one they rewrote.

Literary extension · runs in Grok · free, no sign-up · by @davelalande

MysteryAdventureInvestigationLiterature
▶ Run it in Grok — this URL is all Grok needs
▶ Run in Grok
https://momatio.com/api/prompts/the-secret-of-the-old-mill-a-hardy-mystery
Opens Grok with this URL. Grok fetches the prompt from our API and starts playing. Each scene it builds image, video, audio and music prompts, and offers to send them back to momatio for AI-generated video.

What this is

🔍 A text game you play by talking to Grok. You work the counterfeiting case Frank and Joe Hardy worked in 1927, built on the original text that entered the public domain in 2023 — not the 1962 rewrite, which is a different story. The book is real and quoted; the path you take through it is yours. You get a numbered menu every turn, and you can always type something of your own instead.

Bayport, summer 1927. A pleasant stranger gets his five-dollar bill changed on the station platform and walks away with four good dollars for a bad note.

Work a real counterfeiting case out to the mill on the Willow River:

This is built on the ORIGINAL 1927 text, which entered the US public domain on 1 January 2023 — not the 1962 rewrite, which is a different story about missile parts and is still in copyright until 2058. Type "canon" any time and the game breaks character to tell you which book a thing comes from, what the 1927 text actually says, what the game invented, and where to read the real thing free.

Every scene quietly composes a full media set you can picture or save, and saved scenes become AI-generated films at momatio.

How to play it

1 — COPYCopy the URL above.
2 — PASTEGive that URL to Grok. Nothing else — no prompt text.
3 — PLAYGrok reads it from our API and starts. Every turn ends with a menu.

For agents and developers

The full prompt is served as JSON from momatio's open, no-auth API. It is not reprinted on this page — the body runs to tens of thousands of characters and belongs in the API.

GET https://momatio.com/api/prompts/the-secret-of-the-old-mill-a-hardy-mystery

See also the OpenAPI description, GET /api/prompts?q=… to search, and POST /api/media-prompts to send scene media back.

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