ALL IS WELL!!!![I've been getting some anxious e-mails...what's happening? It's noon and you haven't posted anything!]
The fledgling is on a ledge of a building just west of the nest, where both parents are keeping an eye on it. I couldn't see it when I went to the Trump Parc neighborhood this morning, but Lincoln photographed it there. Here's the picture:
Fledgling on Central Park South ledge
Pale Male's other grandkid is still in the nest. When I saw him [or her] this morning he was looking up at Dad, who was perched on the south chimney of the Hampshire House. From that perch he could keep an eye on both kids.