Professor Egghead: Drawing Between Towns to Create a Search Area

The simple idea

The identified towns are joined on an Ordnance Survey map.

Plain-English version: You are looking for a repeatable rule that turns something odd or deliberate in the clue into useful information. The formal name for this particular technique is Map Polygon / Enclosure.

What to look for

Look for place names, directions, distances, coordinates, road numbers, bearings, or language that can be placed on a map.

What you'll need

A map, ruler or measuring tool when appropriate, and a way to record candidate locations.

Walkthrough: how to think through it

1. Step 1: Translate the clue into a mappable feature or instruction.
2. Step 2: Mark the candidate feature on a map.
3. Step 3: Apply the stated direction, distance, route, or relationship.
4. Step 4: Use an independent clue to confirm that the mapped result is not coincidence.

How Conundrum: The Cadbury’s Creme Egg Mystery used it

The identified towns are joined on an Ordnance Survey map.

That is the important part of the historical example: the solver was not merely told to use Map Polygon / Enclosure. The hunt presented information in a form that made this operation useful. The lesson for a modern hunter is to recognize the signal first, then apply the method consistently.

What it produced

In this example, the method converts the clue material into a more useful output—such as a letter, word, number, direction, location, relationship, or confirmation. The exact output matters less than the reusable lesson: recognize the signal, apply one consistent rule, and confirm the result elsewhere.

Hunter takeaway

Multiple place clues may define a region geometrically rather than name the final point.

How certain is this example?

Evidence level: confirmed/documented. The article keeps documented solution mechanics separate from interpretation where the historical record is incomplete.

Why this belongs in your toolbox: Map Polygon / Enclosure is best treated as a technique to test when the clue gives you the right signals—not as a universal answer to every puzzle. Once you understand the simple operation above, the historical example from Conundrum: The Cadbury’s Creme Egg Mystery shows how a puzzle designer can disguise that operation inside a larger hunt.

Remember this: Multiple place clues may define a region geometrically rather than name the final point.