I decided not to stalk some poor soul on the streets for a picture for today's challenge and in Glasgow taking pictures of people you don't know may result in a big juicy black eye. So I went through all my old photos and there's one that I always stop at and study. It's a picture of my great grandad and my dad on my parents wedding day and it always amazes me how this person is a stranger to me yet, a blood relative. I wish I had known him. So that is my photo for today. My great grandad!