We used to send a lot of postcards from our travels, but that is a ritual lost to time and email. A few people do still get postcards, though: my mother, Allan's great aunt in Vermont, and in this case two friends, for specific reasons. I bought the postcards, tucked them away, and kind of half forgot about them and half kept on the lookout for a post office from which to buy stamps. Every time we saw a mailbox - yellow in Spain, marked correo - I remembered that I didn't have stamps, but I never saw a post office. We asked about stamps at a souvenir store, and they told us to go to a tobacco shop. Anytime we saw a tobacco shop, I would remember the stamps, but we would be busy, or looking for something else, or they were closed for Sunday, or for the long midday break, or for whatever reason, I didn't go in. In a few different cities, we asked again, and would be directed either to a tobacco shop or a post office. Then I would forget about the postcards until we either sa...