I am so very sorry to read of the loss of Vesper. I remember her so well - she was a very beautiful juvie, and I'm sure she was just as beautiful in her adult plumage.
It is even more sad because she had survived the crucial first year and beyond, and was obviously doing very well, in the middle of her second winter down south. She was simply in the wrong place at the wrong time.
I know that a number of peregrines winter along the south coast of Texas, especially in the area of the Padre Islands; it seems a little more unusual for Vesper to have been wintering inland.
I am glad to know that Ty was spotted in October. I would not be surprised to hear of a sighting of Tupper.
Vesper was a very special peregrine, and she will not be forgotten.