Late one August evening in 1863, after an exhausting day at the White House, Lincoln rode alone by horse to the Soldiers’ Home, his family’s summer residence. A private at the gate heard a shot ring out and, moments later, the horse galloped into the compound, with a bareheaded Lincoln clinging to his steed. Lincoln explained that a gunshot had gone off at the foot of the hill, sending the horse galloping so fast it knocked his hat off. Two soldiers retrieved Lincoln’s hat, which had a bullet hole right through it. The president asked the guards to keep the incident under wraps: He didn’t want to worry his wife Mary.