The following public domain title from the Schweich Lectures series is now available on-line in PDF:
D.S. Margoliouth [1858-1940], The Relations between Arabs and Israelites prior to the Rise of Islam. The Schweich Lectures 1921. London: Oxford University Press, 1924. Hbk. pp.87.
Click <<HERE>> for the download link.
More Schweich Lectures can be found HERE.