Althorp Papers. Vol. mdcccxix. Correspondence with: 1. Cardinal Edward McCabe; 1882-1884. 2. William Connor Magee, Bishop of Peterborough and (1891) Archbishop of York; 1868-1875, 1881-1887.
Althorp Papers. Vol. mdcccxx. Correspondence with: 1. John Phillips Allcot, Bishop of Thetford; 1897, 1903-1910. 2. Arthur [T?], Bishop of Thetford in succession to Allcot; 1894-1903.
Althorp Papers. Vol. mdcccxxii. Correspondence with Canon J. Erskine-Clark, Vicar and Rural Dean of Battersea and Chaplain in Ordinary to the Queen; 1872-1874, 1880-1909.
Althorp Papers. Vol. mdcccxxv. 1. Correspondence with Rev. Frederick Ponsonby, Rector at Great Brington, (1868-circa 1875); 1867-1877, 1881-1888, n.d. 2. Letters from Rev. Henry Holmes Stewart, M.A., Rector at Great Brington; [circa 1881]- 1898, n.d. Mostly undated.
Althorp Papers. Vol. mdcccxxvi. Correspondence with the Rev. William Martin, Rector at Great Brington, partly relating to the restoration of Brington Church. See also KS432; 1902-1910.
Althorp Papers. Vol. mdcccxxx. Correspondence with: 1. Rev. Dr. John Griffith, vicar of Sandridge, St. Albans, from [circa 1881-1891]; 1855-1891. 2. Rev. J.A. Cruikshank, vicar of Sandridge, St. Albans, from [circa 1893-1901]; 1876, 1891-1905.