Althorp Papers. Vols. mmdcclxxviii-mmdcclxxxii. Volumes relating to the Althorp Stud, giving information on horses' names, pedigrees, acquisition, disposal etc. Five volumes.
Althorp Papers. Vol. mmdcclxxix. Horse book started by John Charles, Viscount Althorp, in 1803; used by his successors Frederick, 4th Earl Spencer, and John Poyntz, 5th Earl Spencer; 1803-1954.