It means he keeps others out of the tower. He’s involved with whatever that device is that was shown in the start of this tale. By doing the work himself, it keeps private things private.
As the old saying goes “Something is rotten in Denmark”
What IS going on with all these sneaky so-and-sos??? Terrorists getting silenced by assassins, architects who seem to be up to no good and very suspicious people hanging around the bell tower….very shady stuff to be sure…..
I thought I’d seen this before….welp I can ignore this strip until Dec. 15 it seems.