September 24, 1868, Lincoln married the former Mary Eunice Harlan (1846–1937), daughter of Senator James Harlan and Ann Eliza Peck of Mount Pleasant, Iowa. They had three children, two daughters and one son. In an era before air conditioning, Robert, Mary, and the children would often leave their hot city life behind for the cooler climate of Mt. Pleasant. During the 1880s the family would summer at the Harlan home. The Harlan-Lincoln home, built in 1876, still stands today. Donated by Mary Harlan Lincoln to Iowa Wesleyan College in 1907, it now serves as a museum containing a collection of artifacts from the Lincoln family and from Abraham Lincoln's presidency. Of Robert's children, Jessie Harlan Lincoln Beckwith (1875–1948) had two children, but neither of them (Mary Lincoln Beckwith ("Peggy" 1898–1975) nor Robert Todd Lincoln Beckwith ("Bud") (1904–1985)) had children of their own. Robert's other daughter, Mary Todd Lincoln ("Mamie") (1869–1938) married Charles Bradford Isham in 1891. They had one son, Lincoln Isham (1892–1971), who married Leahalma Correa in 1919, but died without children. The last person acknowledged and known to be of direct Lincoln lineage, Robert's grandson Robert Todd Lincoln Beckwith, died in 1985. Relationship with Mary Todd Lincoln In 1871, tragedy beset the family again when Lincoln's only surviving brother, Tad, died at the age of 18, leaving his mother devastated with grief. Lincoln was already concerned about what he thought were his mother's "spend-thrift" ways, hallucinations, paranoia, and increasingly eccentric behaviors and thoughts. Fearing that she was a danger to herself, he arranged to have her committed to a psychiatric hospital in Batavia, Illinois, in 1875. With his mother in the hospital, he was left with control of her finances, although he used his own money to pay for her care. As the head of the family, he felt that it was his duty to protect her, although he did wish that she would have “every liberty and privilege” restored to her as soon as she was better. On May 20, 1875, she arrived at Bellevue Place, a private, upscale sanitarium in the Fox River Valley. Three months after she started living there, Mary Lincoln was able to escape from Bellevue Place. She smuggled letters to her lawyer, James B. Bradwell, and his wife, Myra, who was Mary's friend as well as a feminist lawyer and spiritualist. Mary also wrote to the editor of the Chicago Times and