EC0050
Poem is "an address to the officers and soldiers of the American Army by David Humphreys, Colonel in the service of the United States, and Aid-de-Camp to his Excellency General Washington." Contains preface before poem. Newspaper on WorldCat, but specific issue is not.
Wikipedia: David Humphreys (July 10, 1752 – February 21, 1818) was an American Revolutionary War colonel and aide de camp to George Washington, American minister to Portugal and then to Spain, entrepreneur who brought Merino sheep to America and member of the Connecticut state legislature. A poet and author, he was one of the "Hartford Wits." Humphreys enjoyed writing and had a voluminous correspondence with Washington, now in the Library of Congress. He also wrote for the public and was the author of a "Life of General Israel Putnam," whose staff he served on. He was one of the writers called the Hartford Wits (the others were Joel Barlow, Timothy Dwight IV, John Trumbull and Lemuel Hopkins).[17] In 1802, he wrote an anti-slavery poem entitled "A Poem on the Industry of the United States of America." He also served again as a member of the Connecticut state house of representatives, from 1812 to 1814. He was elected a Fellow of the Royal Society of London in June 1807 [18]