Mazeppa is a narrative poem written by the English romantic poet Lord Byron in 1819.
 It is based on a popular legend about the early life of Ivan Mazepa (1639–1709), a Ukrainian gentleman who later became Hetman of the Ukrainian Cossacks.
 According to the poem, the young Mazeppa has a love affair with a Countess Theresa while serving as a page at the Court of King John II Casimir Vasa.
 Countess Theresa was married to a much older Count.
 On discovering the affair, the Count punishes Mazeppa by tying him naked to a wild horse and setting the horse loose.
 The bulk of the poem describes the traumatic journey of the hero strapped to the horse.
 The poem has been praised for its "vigor of style and its sharp realization of the feelings of suffering and endurance".
 This poem also inspired Alexander Pushkin to write his poem "Poltava" as an answer to Byron's poem.
Tim Miller (born August 23, 1979) is an American poet and nonfiction writer.
 His work is essentially a dialogue and addition to ancient literature, world mythology, and religious scripture.
 Recently he has published a long narrative poem, "To the House of the Sun", portions of which had previously appeared online, in print, and in video form.
The Bronze Horseman: A Petersburg Tale (Russian: Медный всадник: Петербургская повесть , literally: "The Copper Horseman") is a narrative poem written by Alexander Pushkin in 1833 about the equestrian statue of Peter the Great in Saint Petersburg and the great flood of 1824.
 While the poem was written in 1833, it was not published, in its entirety, until after his death as his work was under censorship due to the political nature of his other writings.
 Widely considered to be Pushkin's most successful narrative poem, "The Bronze Horseman" has had a lasting impact on Russian literature.
 It is considered one of the most influential works in Russian Literature, and is one of the reasons Pushkin is often called the “founder of modern Russian literature.”
 The statue became known as the Bronze Horseman due to the great influence of the poem.
The Courtship of Miles Standish is an 1858 narrative poem by American poet Henry Wadsworth Longfellow about the early days of Plymouth Colony, the colonial settlement established in America by the Mayflower Pilgrims.
Rose Hartwick Thorpe (July 18, 1850 – July 19, 1939) was an American poet and writer, remembered largely for the narrative poem, "Curfew Must Not Ring Tonight" (1867), which gained national popularity.
 Other poems followed, among them being "The Station Agent's Story," "Red Cross," and "In a Mining Town."
 Although a busy and prolific author, she was ill for some years.
 In 1888, she and her family removed to San Diego, California, living in Rosemere, Pacific Beach.
Stephen Vincent Benét (July 22, 1898 – March 13, 1943) was an American poet, short story writer, and novelist.
 He is best known for his book-length narrative poem of the American Civil War "John Brown's Body" (1928), for which he won a Pulitzer Prize in 1929, and for the short stories "The Devil and Daniel Webster" (1936) and "By the Waters of Babylon" (1937).
 In 2009, The Library of America selected Benét’s story "The King of the Cats" (1929) for inclusion in its two-century retrospective of "American Fantastic Tales" edited by Peter Straub.
Steven P. Schneider is an American poet, critic, and professor of English at the University of Texas-Pan American, where he serves as Director of New Programs and Special Projects in the College of Arts and Humanities.
 He is the author of three books of poetry, "Borderlines: Drawing Border Lives "(Wings Press), a collaborative effort with his wife, Reefka Schneider, "Unexpected Guest"s (Blue Light Press), and "Prairie Air Show "(Hurakan Publications and Sandhills Press).
 He is the author and editor of several scholarly books, including "The Contemporary Narrative Poem: Critical Crosscurrents "(University of Iowa Press), a collection of ten essays from poet-critics on the contemporary American narrative poem.
Lilith, The Legend of the First Woman is a 19th-century narrative poem in five books, written by the American poet, Ada Langworthy Collier, in 1885, and published in Boston by D Lothrop & Company.
 It has been reprinted several times in the 21st century.
Béroul was a Norman poet of the 12th century.
 He wrote "Tristan", a Norman language version of the legend of Tristan and Iseult of which a certain number of fragments (approximately 3000 verses) have been preserved; it is the earliest representation of the so-called "vulgar" version of the legend (the "courtly" version being represented by fragments from Thomas of Britain's poem).
 Eilhart von Oberge wrote a treatment of this version in German, and many of Béroul's episodes that do not appear in Thomas reappear in the Prose "Tristan".
 Beroul's poem survives in a single manuscript now in the Bibliothèque Nationale in Paris.
 This copy is poorly written and there is a suggestion that part of the poem was written by a different scribe from the rest.
 The actual content of the poem also differs from the modern conception of what a narrative poem should be; the plot is disjointed and lacking in a flow of cause and effect, and the characters are poorly defined.
 Nevertheless, Fedrick proposes that this was common of literature in Beroul's time.
Curfew Must Not Ring Tonight is a narrative poem by Rose Hartwick Thorpe, written in 1867 and set in the 17th century.
 It was written when she was 16 years old and first published in "Detroit Commercial Advertiser".

Question: when was a narrative poem most known from an American poet born July 18, 1850 written?
Answer: 1867