Crowds were lined up on both sides three deep along Holiday Street leading to City Hall, on the afternoon of August 15, 1971, cheering, “We love you, Cass.” The Cass was Cass Elliott, The Momma Cass who popularized such hits as “Make your Own Kind of Music.” She was actually Ellen Naomi Cohen, grew up in Baltimore, attended Forest Park High School and dropped out two weeks before she was to graduate. She went to New York to try her luck as a pop vocalist. Her luck was very good. But Baltimore never took to her, and this welcoming parade was the City’s attempt to make up for that indiscretion. As does this story…