The Penkill collection consists of records of William Bell Scott, Alice Boyd and Margaret Courtenay. The collection includes five hundred letters from Scott to Alice Boyd, and a large number of letters to Scott and Boyd from other artists and writers. Also in the collection are the letters from Arthur Hughes and letters concerning the 1872 illness of Dante Gabriel Rossetti. The collection also includes the diaries of W.B. Scott, Alice Boyd and Margaret Courtenay.