Letters from War: 1861 | Peter Byrne visits his son at Camp Lyon near the Chain Bridge in Washington, DC

A father visits his son at war - and ends up behind Union lines in Virginia Peter Byrne came to Washington to check on his son, a lieutenant in the 1st Pennsylvania Light Artillery. He left having crossed into Virginia in a borrowed uniform, stood behind an artillery battery in the pouring rain, and talked his way back across the Chain Bridge using a pass that called him "Colonel." Read the full letter.

Letters from War: 1861 | Martin J. Byrne guards the Chain Bridge above Washington

From his post guarding the Chain Bridge above Washington, Lieutenant Martin Byrne watched General McClellan and President Lincoln ride through a grand review of the division on August 21, 1861. Lincoln, he noted, had "that lofty, though care worn appearance." Read the full letter.

Letters from War: 1861 | Martin J. Byrne describes the armed camp of Washington in August 1861

Martin Byrne arrived in Washington on August 6, 1861 and found a city locked down by mounted police, drilling soldiers, and the weight of a war gone badly wrong. He wrote home to say his health had never been better — and that he'd gained twenty pounds since leaving Carbondale. Read the letter.

Letters from War: 1861 | Returning soldiers riot in Harrisburg as Martin Byrne writes home to Carbondale

After the disaster at Bull Run, thousands of unpaid soldiers flooded Harrisburg and turned to rioting — storming the arsenal, ransacking a hotel for the paymaster. A young Carbondale officer watched it unfold and called Patterson a "double-dyed traitor." Read the full letter.