Gladstone's Diary records all the books which he read and persons with whom he talked.

If a man read a book, it cannot be asserted with certainty that he was influenced by the book. Knowledge passed into the mind if it was interesting enough not to be forgotten. But it is a larger step to attempt an analysis of the development of a mind when the evidence consists largely in lists of books read. On the books which Gladstone read, he seldom commented in the Diary. When rarely he added a comment, it is always important.

The death of Canon R.J. Campbell on 1 March 1956 did not cause a national stir. There was an obituary the following day in The Times and some comment on subsequent days from friends and associates, but little to indicate that fifty years earlier he had been a substantial public figure. One obscure diarist, who had known Campbell as a young man, felt that ‘the grudging admission…of some academic distinction’ was an inadequate summary of Campbell's life and work. In part, of course, having outlived most of his contemporaries, Campbell was paying the penalty for his longevity. More important, however, was the fact that for decades he had consciously avoided the limelight. ‘No man’ he had written to the novelist Margaret Lane in December 1947 ‘could more carefully avoid publicity than I have done for a generation’. From 1930 to 1946 he had been a residentiary canon and then chancellor of Chichester and before that served as vicar of Holy Trinity, Brighton for six years. It would appear that he possessed an eminently Anglican pedigree. In May 1903, however, a frail, ascetic-looking, prematurely white-haired Campbell had commenced his ministry at the City Temple, the leading Congregational church in London. W. T. Stead's Review of Reviews looked forward to the ‘Renascence of Nonconformity’ under the leadership of this thirty-five-year-old young man. Over seven thousand people attended the services on his first Sunday. Picture postcards of Campbell were soon on sale and later admirers could purchase the R. J. Campbell Birthday Book containing his ‘favourite poetical quotations, portrait and autograph’. There was even A Rosary from the City Temple, described as being threaded from the writings and sermons of R. J. Campbell. The publicity which attended his arrival in London rarely left him for the next dozen years. In September 1915, rumours of Campbell's intention to resign the pastorate and speculation about his subsequent course were thought of sufficient interest to reach the news columns of The Times. His resignation merited a leader in the newspaper and, following his reception into the Church of England in early October, the comments of prominent religious leaders were printed. In 1916 Campbell published A Spiritual Pilgrimage, and a reconsideration of this volume throws interesting light on the cross-currents of Edwardian religious life.