chapter 64 Two groups of robbers

Although he didn't know anything, Fiskr Small had a vague feeling that there was something going on here, and it wasn't as simple as it seemed. Moreover, this wave of robbers probably left just before Fiskr Small came back. The time it took to clean up the traces so long and with such ease proved that they were not worried about Fiskr Small sudden return.

So where did they get the confidence to determine how long it would take Fiskr Small to come back. They knew that it was normal...