Missing elderly man Samuel Eldridge last seen near the coffee shop on 19th Avenue, downtown Quad Cities.

My father, Samuel Eldridge, has been missing since yesterday afternoon. He was last seen wandering near the coffee shop on 19th Avenue in downtown Quad Cities. Samuel is 78 years old, has a gray beard, and was wearing a navy blue sweater and brown shoes. We are very worried about him and would appreciate any information on his whereabouts.