One hour was not enough for me, I spent three hours with Margaret and that was not enough time - I needed an entire weekend, her knowledge is vast. Tours can be whatever you want them to be, she's in your hands, so you do what you like in terms of info, timing and touring. Callanish should not be seen without a tour. I will be heading back to Lewis in May 2011 and will deffo be arrnaging to see margaret again. You will not be disappointed.