Sorry to be late - I was out of town until late last night.
I have a hard cover First Edition of the Rollins book. The flags in Appendix C are the details of each one and why they stopped at 51 (and are even missing some number before that) is a mystery to me. I do not recall ever asking him about it. He got a lot of this information from Howard Madaus and Rollins either never got it all from him or who knows.
The charts in the earlier appendix cover the flag captures through 59 of course.
Greg Biggs