My husband and his family abandoned me in a foreign country with nothing. They thought I was helpless until I made my next move.

Suddenly, an old, seemingly useless piece of data floated into the forefront of my mind. A seven-digit sequence.

Years ago, my former director, Martin Shaw, had instituted a mandatory safety drill. He forced every senior consultant to memorize one international emergency contact number. I had mocked him relentlessly for it. No one memorizes numbers in the digital age, Martin, I had teased. Exactly, he had replied, utterly humorless.