The Medford Historical Society & Museum presents Medford wildlife photographer John Harrison in a talk about his newest book, "Bald Eagles of the Mystic Lakes," published as a part of a True Wildlife Series for Children. He will also discuss many of the other birds that populate the area. Harrison's work appeals to adults and children, wildlife lovers, and those who enjoy the Mystic Lakes. Harrison authors the Medford Wildlife Watch column in the Medford Transcript. Among his other books…