A friend made by a coincidence

My wife and I were visiting a small town when we decided to have a cup of tea before catching the train home. There were several cafes in the town centre and we chose one at random. On the counter, there were several old magazines and I chose one at random. In it was a letter from a man in Canada who wanted to be put in touch with me - I'd written an article for the magazine earlier. I got in touch with him and we corresponded for a while. Seven years later my wife and I were planning on a Canadian holiday. From what we remembered about the Canadian, we trawled the internet and eventually discovered him. We were in email contact within minutes. On holiday in Vancouver, we visited him and discovered that his apartment number was 2370, the WWI army number of my grandfather.