The Morningside Hawks Blog has reported feeding activity up at St. John, so I checked it out this afternoon. The new nest location this year is one saint clockwise from previous years, above St. Peter. Previously, it was a little lower down on the shoulders of St. Andrew.
While I was there there were two feedings, and I saw a slice come out of the nest. The eyasses are too small to see just yet, but the feeding and the slice are enough to let us know there are youngsters.
This late hatch is most likely from a second clutch of eggs.