It seems to em that it would be unlikely that Lovecraft (about age 23) would have attended this lecture. He was a stalwart supporter of the South after the fact. His racial proclivities are well known. We just don't know a lot about his daily activities in this early stage of his life.
Still, it was a prominent event and he would have known of it.
Here is what the seller states:
OFFERED: is a vintage and original invitation card to a lecture by Mrs. Maud Howe Elliot, a renowned Rhode Island Pulitzer prize-winning author, and member of an abolitionist family. The lecture, Artists' Life In Rome, occurred in 1913 at the Providence Art Club. On the verso are peculiar written notes in period ink pertaining to St. Francis of Assisi (patron saint of animals). CONDITION: nice with moderate wear and patina
RESEARCH: “Maud Howe Elliott (b. November 9, 1854, Boston, Massachusetts; d. March 19, 1948, Newport, Rhode Island) was an American writer, most notable for her Pulitzer prize-winning collaboration with her sister, Laura E. Richards, on their mother's biography The Life of Julia Ward Howe (1916). Her other works included A Newport Aquarelle (1883), Mammon, Roma Beata (1904), John Elliott, The Story of an Artist (1930), and This Was My Newport (1944). She married English artist John Elliott in 1887.”
”Julia Ward Howe (May 27, 1819 – October 17, 1910) was a prominent American abolitionist, social activist, and poet most famous as the author of "The Battle Hymn of the Republic." Born Julia Ward in New York City, she was the fourth of seven children born to Samuel Ward (1786 – 1839) and Julia Rush Cutler. Her father was a well-to-do banker. Her paternal grandparents were Lieutenant Colonel Samuel Ward (May 1, 1756 – November 27, 1839) of the Continental Army and Phoebe Greene. Her maternal grandparents were Benjamin Clarke and Sarah Mitchell Cutler. Lieutenant Colonel Samuel Ward was a son of Samuel Ward, a colonial Governor of Rhode Island and later a delegate to the Continental Congress, and his wife Anna Ray. Phoebe Greene was a daughter of William Greene, Governor of Rhode Island and his wife Catharine Ray. In 1843 she married a hero of the Greek revolution, physician Dr. Samuel Gridley Howe nicknamed Chev, who founded the Perkins Institute for the Blind. The couple made their home in South Boston, had six children (five of whom lived to adulthood), and were active in the Free Soil Party. She was a member of the Unitarian church. Howe died of pneumonia at her home, Oak Glen, in Portsmouth, Rhode Island, at the age of 91. She is buried in the Mount Auburn Cemetery in Cambridge, Massachusetts. Social activism Howe's "Battle Hymn of the Republic", set to William Steffe's already-existing music, was first published in the Atlantic Monthly in 1862 and quickly became one of the most popular songs of the Union during the American Civil War. In 1870 Howe was the first to proclaim Mother's Day, with her Mother's Day Proclamation. After the war Howe focused her activities on the causes of pacifism and women's suffrage. From 1872 to 1879, she assisted Lucy Stone and Henry Brown Blackwell in editing Woman's Journal. Honors On January 28, 1908 Howe became the first woman elected to the American Academy of Arts and Letters. Howe was inducted posthumously into the Songwriters Hall of Fame in 1970.”
