Covering almost a year of Loring's service, I Held Lincoln describes the lieutenant's command of the gunboat USS Wave, the Battle of Calcasieu Pass, the surrender of his ship, and his capture by the Confederates. He was incarcerated in Camp Groce, a deadly Confederate prison where he endured horrific conditions and abuse. Loring attempted to escape, evading capture for ten days behind enemy lines, only to be recaptured just a few miles from freedom. After an arduous second escape, he finally reached the safety of Union lines and gained his freedom.

On the night of April 14, 1865, Loring attended Ford's Theater and witnessed one of the single most tragic events in American history: the assassination of President Abraham Lincoln. After the shot rang out, Loring climbed into the presidential box and assisted the dying president, helping to carry him across the street to the Peterson House. Using Loring's recently discovered private journal, Richard E. Quest tells this astonishing story, giving insight into a little-known Confederate prison camp during the last days of the Civil War and providing much-deserved recognition to a man whose journey was nearly lost to American history.