Once, a customer and his wife visited me on business. They struck me as nice people but their home was some 1500 miles away so there was no chance to get together socially. Over the next year, we ended up doing a little business and at some point met once again for dinner when they visited New York. I recently learned that, sadly, the fellow died. I dropped his now widow a note and received a warm reply. I feel like I have one more friend out in the world.