Lamb saw active service in the First World War in the Royal Army Medical Corps as an battalion medical officier with the 5th Battalion, The Royal Inniskilling Fusiliers and was awarded the Military Cross.
A novelist, biographer, and translator of French poetry, she was the wife of the Australian-born painter Henry Lamb.
Longford's daughters were Lady Violet Pakenham, a writer and critic and the wife of the noted novelist Anthony Powell, Lady Mary Clive, author of Christmas at the Savages and other novels, Lady Pansy Lamb, novelist, biographer, and wife of the painter Henry Lamb and Lady Julia Mount, mother of Sir Ferdinand Mount.
Henry VIII of England | Henry VIII | Henry Kissinger | Henry Wadsworth Longfellow | Henry II of England | Henry II | Henry III of England | Henry IV of France | Henry IV | Henry | Henry Ford | Henry James | Henry VII of England | Henry III | Henry Moore | Henry Miller | Henry I of England | Henry Clay | Henry IV of England | Patrick Henry | Henry Mancini | Henry V | Henry David Thoreau | Joseph Henry Blackburne | Henry V of England | Henry VI of England | Henry VII | Henry II of France | Henry Fonda | John Henry Newman |
In summer of 2012, Salisbury Museum presented 'Circles And Tangents' featuring the work of artists connected with Cranborne Chase, including Augustus John, Henry Lamb, Ben Nicholson, John Craxton, Lucian Freud, Stanley Spencer, Elisabeth Frink, William Nicholson and over 25 other artists.