A sermon preach'd in the Parish-Church of Christ-Church, London; on Thursday May the 3d, 1739 : Being the time of the yearly meeting of the Children Educated in the Charity-Schools, in and about the cities of London and Westminster. By Nicolas lord bishop of St. Davids. Publish'd at the request of the gentlemen concerned in the said charity. To which is annexed, an account of the origin and designs of the Society for Promoting Christian Knowledge.