View of rock formation on Mackinac Island shaped like an arch; sailboat on water visible through arch. Printed on front: "Arch rock, Mackinac Island, Mich. 5147. Copyright 1899 by Detroit Photographic Co." Handwritten on front: "My husband and I are certainly getting treated in fine style by everyone. I'm happy as can be. Yours, Grace M." Card is postmarked June 29, 1907.
