Find out all about Dear Miss. Lane, favoured by Queen Victoria, patron of the first paediatric hospital in the States, and leading figure in federal sponsorship of the arts. 

Bibliography:
https://www.whitehouse.gov/about-the-white-house/first-ladies/harriet-lane/
http://www.firstladies.org/biographies/firstladies.aspx?biography=16
https://millercenter.org/president/buchanan/essays/lane-1857-firstlady
American National Biography Database by Mary K. Dains 
Lloyd C Taylor Jr. ‘Harriet Lane- Mirror of an Age,’ Pennsylvania History: A Journal of Mid-Atlantic Studies, April, 1963, Vol. 30, No. 2 (April 1963) pp. 212-225
Homer T Rosenberger, Harriet Lane Johnston and the Formation of a National Gallery of Art, Records of the Columbia Historical Society, Washington DC, 1969/1970, Vol. 60/70, pp. 399-442