Arthur Sampson Napier (1853-1916) was an eminent philologist, the first Merton Professor of English Language and Literature at Oxford University, 1885-1904, and Rawlinsonian Professor of Anglo-Saxon from 1903. See Who Was Who, and Neil Ker 'A.S. Napier, 1853-1916' in Philological Essays: Studies in Old and Middle English Literature in honour of Herbert Dean Meritt, ed. James L. Rosser (Janua Linguarum, series major 37, 1970), pp. 152-81, for details.
From the guide to the Papers of A.S. Napier, late 19th-early 20th century, (University of Oxford, English Faculty Library)