Logical Error?

[Erklitt]

I tremble to suggest this, and maybe someone can help me out with a satisfying answer. Here's my problem:

Ryan sabotaged Ulric's beacon. When John meets Ryan, they guess that it still worked in part since John got through, though somewhere unexpected. And Ulric somehow could trace where he had landed. Then it turns out Ulric's beacon really doesn't work anymore, and it was Logna who 'fetched' John. Nothing to do with Ulric's beacon. 

So, how did Ulric know that someone had landed in Stenford? 

[LiseeLou she/her]

The locals told him about the burnt field and papers and he figured it out from there. Page 54

[Erklitt]

Thanks!