Caitlin Johnston was our tour guide. Actually, we entered onto Boston Commons and we heard Caitlin on the Freedom Tour. We listened and she was so excellent, we followed her and paid her at the end. We had not planned on this type of tour but she was good so we changed our plans. She does the first 16 sites of the Freedom Tour and speaks loudly and clearly and could always be heard no matter where we were standing. She was very knowledgeable and was able to do English accents while being dressed in period attire. She asked if there were questions at the end of each site. The tour takes 90 minutes. If I went back to Boston, I would find a tour she was giving. She also does private tours of other sites such as Harvard. The next day, my husband and I went back to the cemetery and there were 3 different tours guides there in different sections. None spoke as clearly and kept my interest as Caitlin had. I would recommend her for a tour. You will not be disappointed.