All week we’ll be giving you a peek at the gifts we here at Atlas Obscura and Gastro Obscura have on our wishlists. Sometimes the days slip away during the holiday season and suddenly it’s just hours until the gift exchange. We’ve all been there—and we have a solution for you. Here are some of our favorite gift subscriptions and memberships, all available online. Historic letters For the politics wonk. Letterjoy delivers a history lesson directly to your mailbox. Every week, the company sends reproductions of real letters, written by…