Meanings of had underground in English

My reply was: There are no wigs to be had underground.

Walsh was a senior officer and the police station had underground parking, but would he park there?

The larger houses which made up Litany Lane had underground cellars; in the court there were fortunately no such retreats.

He told us: 'Not the Teutons,' but he released von Bergow and all the prisoners he had underground, God knows why!

The Spiders did it, in their southern fastnesses, and it was rumoured that Helleron had underground fighting dens, for the connoisseur of death as entertainment.