Althorp Papers. Vol. mviii. Volume, mostly autograph, with a few later entries in another hand, containing details of the dimensions and growth rates of several trees in Althorp Park; 1793-1928. 270 x 215 mm.
Althorp Papers. Vol. mix. Autograph volume containing details of the dimensions and growth rates of trees at Wimbledon Park; 1806-1826. Contains typescript paper recording measurements of trees up to 1948. 230 x 192 mm.