Bruce then gave me the detailed trunking information I needed to continue the trace. I also asked him for the number of the switching center that managed the LA70 tandem. My uncanny ability to remember telephone numbers came in handy once again: I didn’t have to scribble the number down with one hand while steering with the other. (In fact, most of the phone numbers and people’s names in this book are the real thing, still imprinted in my memory from as much as twenty years ago.)