**This is an excerpt from my first book, A Modern Celt: Seeking the Ancestors. The Winter Solstice has always been an incredibly magical time for me, despite not being (as far as we know) typically a Celtic festival. Here are some of my more mysterious experiences during the shortest day and longest night.   My most precious memories of the winter solstice all seem to be of going to a specific lakeside on the longest night. I remember it always feels later in the day than it is, because despite it only being early evening it is already pitch black, and once you move away from the roads there…