"SIR,--I thank you kindly for sending me a copy of the _National Reformer_ for December 23rd. I shall read with interest any criticisms you may be pleased to make on my book on 'Theism,' and I shall endeavour to answer them in a note or notes to the volume on 'Anti-theistic Theories,' a copy of which will be forwarded to you. I regret that my time will not allow me to do more than this.--Thanking you sincerely for your personal courtesy towards me, from whose views you so thoroughly dissent, I am, Sir, yours very truly, R. FLINT. "C. BRADLAUGH." In the autumn of 1878 Mr Bradlaugh determined to take one of Professor Flint's lectures, "Is belief in God reasonable?" and make some reply to it from an Edinburgh platform. The Music Hall was duly engaged, the lectures were advertised for the 26th and 27th of September, and everything promised successful meetings both for himself and for Mrs Besant. On the 23rd, however, the directors of the hall cancelled the hiring. As Mrs Besant's subject was "Christianity: Immoral in Theory and Demoralising in Practice," it was thought at the outset that the refusal was on her account, but a special mention of the subject of Mr Bradlaugh's lecture in the letter written by the directors contradicted this impression. The Edinburgh Freethinkers were indignant; they sought legal advice, but found they had no redress, Professor Flint's lectures had been largely attended and fully reported in the Scotch papers, but of course he had argued in the affirmative. The Committee who had arranged the lectures for Mr Bradlaugh and Mrs Besant then went to the Artillery Hall, and explained all the circumstances; the hall was then hired and paid for, but on the same afternoon the hall-keeper returned the money, saying that the proprietors would not let it for the purposes required, and further, that he was instructed to have the place "guarded by police" on the Thursday and Friday evenings. Many fruitless attempts were made to obtain a hall. On Thursday Mrs Besant's lecture had to be abandoned, and we went to the theatre instead, whilst a large number of persons, who had not seen the notices of postponement, assembled at the Artillery Hall. The Society of Arts Hall was obtained for Friday, and when this was known, much pressure was put upon the proprietors to rescind their contract; they held out until the afternoon, then they also gave way and refused the hall, and when the audience came in the evening they found the doors locked and the place under police protection. At last Mr Bradlaugh wrote to Professor Flint, shortly stating the case, and appealing to his sense of fair play to aid him in procuring a platform in Edinburgh where he might reply to his arguments. To this letter he received the following reply:-- "Edinburgh, September 30, 1878.