I found this sentence:
He stopped for a moment, then walked across to the house.
I can’t understand the meaning of “across” and the use of “to the”.
The context: a man (“he”) is hiding in the garden of a house and the owner of the house call him in whispering.
This is an acceptable sentence, when it says “across” it’s leaving you to mentally insert what he walked across. So, the full version of the sentence would actually read something like:
He stopped for a moment, then walked across [the lawn/yard] to the house.
With this added detail, I hope it becomes clear what was occurring in this situation.