What Do You Think Sleuths???

[Rtaxron]

I live in a small quiet cul-de-sac of, 4 houses, & 3 bungalows, with no front gardens, only small plots under the windows.

When my daughter visited yesterday afternoon, there was a house brick, close to the right side of my front door.

There are no building sites near, hardly any kids, so was wondering if this could have been placed there, as a sign for thieves, like some do marking walls with chalk.?

[Prudie]

To quoin a phrase - it's a mythtery

[-Talbot-]

We're still searching for a clue.