The Postscript: Waiting for a friend

My husband, Peter, told me about the unlikely friendship.

When we stay in Mexico, Peter walks the same route up to the environmental preserve every day. It’s a steep climb to the park, which is filled with wildlife and rare plants. Because Peter walks the same streets daily, he has gotten to know a lot of the people who have homes on the way up.

The whole thing started with Reacher, an exuberant 75-pound Belgian Malinois, and his American expat owner, Anita. The Belgian Malinois is a dog often trained for search and rescue. You might have seen videos of them scaling walls. Peter never saw Reac...