Professor Adam C. Welch’s 1938 Schweich Lectures of the British Academy (1938) are now available on-line – the work became public domain on 1st January this year:
Adam C. Welch [1864-1943], The Work of the Chronicler: Its Purpose and Its Date. The Schweich Lectures of the British Academy 1938. London: Oxford University Press, 1939. Hbk. 163.