Yes, Earlybird, you are being impatient
The chicks don't usually hatch all at once, there is generally some time between them. Sometimes it is just a few hours, sometimes a day. Last year, the first of our chicks hatched early on a Monday morning, the last, Mistral, hatched on the Wednesday afternoon. Most hatchings, 40% according to the literature, occur in the morning. Certainly most of ours do.
So think happy thoughts, the third chick will probably be out by tomorrow.
And no, this isn't where Princess was hatched. She was hatched on the NSP Power Station in Minneapolis, Minnesota. There are lots of nestboxes on power stations in the US. The Elk River Station is, I believe, a biomass fuel plant that makes electricity from municipal refuse (plant matter and animal waste). Cool place to have nesting peregrines I've always thought!
As for who they are, I'm afraid I don't know, but I will find out for us all!