Where are the Thieves Caches in White run?

Question

I spotted the Thieves cache symbol outside Belathors General Goods in Whiterun, but can't seem to find it, where is it, and the others in Whiterun?

Answer 1

What you saw on his door was not the 'Thieves Cache' mark, which looks like this:

It was the "Loot Here!" mark, indicating that Belethor's shop is a good place to rob. It looks like this:

While the interior of both symbols is the same, the exterior border differs. This matters.

The Thieves Cache mark is only directly on the cache itself - never nearby.

The Whiterun Caches, for reference, are behind Carlotta Valentia's house, South of House Grey-Mane in the City Wall, and behind the Bannered Mare.

For more on Shadowmarks, see this answer.