Poem "Crossing the Song Ba" or Đà Rằng is a river in the South Central Coast region of Vietnam and flows into the South China Sea in Tuy Hòa, Phú Yên Province.

Letter inlaid from author: "Dear Mr. Tomlinson: I've long been aware of your poetry and your interest in American poetry. I admire both of those aspects of your work. For that reason and I hope it's not an imposition I decided to send the enclosed. Nightvision, my first book, was published here in England and it's a great pleasure to be sending it back to its source, and to a poet of your significance. If, in fact, you take any pleasure of your own in this book, it would be particularly meaningful to hear from you. At any rate, may this find you in good spirits and healthy. Very Best regards, George Evans" dated 17 Dec 1983
[Presumably adressed to poet Charles Tomlinson]

Bio from http://www.worldliteraturetoday.org/author/george-evans
George Evans is the author of five books of poetry published in the United States and England, including The New World (2002) and Sudden Dreams (1995). His poetry, fiction, essays, and translations have been published in literary magazines throughout the U.S. and in Australia, England, France, Ireland, Japan, Nicaragua, and Viet Nam. His honors include writing fellowships from the National Endowment for the Arts, the Lannan Foundation, the California Arts Council, and a Japanese government Monbusho Fellowship for the study of Japanese literature. He has also co-translated The Violent Foam: New and Selected Poems (2002), by his wife, Nicaraguan poet Daisy Zamora; The Time Tree (2003), poems by Vietnamese poet Huu Thinh; and edited the two-volume correspondence of Charles Olson and Cid Corman. An antiwar activist veteran of the Viet Nam War, he is one of the subjects of the recent radio series Shared Weight, a six-episode program addressing the impact of war on culture and society, produced for National Public Radio (NPR) by the Center for Emerging Media at WYPR in Baltimore.