Queen walking on the outside of hive

[urbanbeesLondon]

Per chance was passing my hive and saw queen walking on the outside of the hive. I placed her at entrance and she was seemingly accepted into hive as she walked into the darkeness.
She is new (i introduced a virgin 19 days ago) but there is brood present so she is laying.

I was thinking
1. She was from another colony and got lost - but there are no colonies near me.
2. She had returned from a mating flight - but there is brood inside.
3. SHe was going on a mating flight - but there is brood inside
4. There were two queens inside the hive and one was leaving
5. eh couldn't think of another reason

Anyone got a suggestion why the queen was on the outside?

Cheers
Brian

[IndianaHoney]

If you have brood and more importantly eggs, than the queen is done mating. Chances are this was a virgin from a nearby hive that landed at the wrong hive. If I were you I would check the other hives for a laying queen.