Contents -- Prologue: Walking Chaucer -- River Flying: The Sheyenne River -- Short-Hop Notebook: Dakota Sky -- A Wall of Old Trees -- Short-Hop Notebook: Math Class -- River Flying: The Red River -- Short-Hop Notebook: Fame -- Afternoon at the Atomic Café -- Ground Reference -- Short-Hop Notebook: Stats -- Storm Flying -- Short-Hop Notebook: Jazz -- Tag -- Short-Hop Notebook: The Swoop -- That Thing Up Front -- A Very Deep Low -- Monster Sky -- Thin Places and Thick Time: A Duet for Two Worlds -- Deep SWE -- Collecting the Horizon -- The Beautiful Line -- Acknowledgments.