Magazine  (1877)  Page(s) 260.  
 
Marquis of Salisbury. — Flor. Mag. 1874, pl. 127.
 

Magazine  (May 1874)  Page(s) 115.  
 
Notable New Plants and Flowers.
Clematis Marquis of Salibury [First-class Certificate]. — A very fine addition to the spring-flowering section, having rich bright maroon-purple six-sepaled flowers, with a flame of claret-red along each segment. — Messrs. Jackman & Son: R.H.S., April 15.

Magazine  (1874)  Page(s) Plate 127.  Includes photo(s).
 
Clematis — "Marquis of Salisbury".
The very fine variety of Clematis we now figure makes a notable addition to the series of Clematis we have illustrated in former Numbers of this Magazine, and will at once remind our readers of the grand Clematis rubro-violacea and C. Jackmani, figured in Plates 215 and 226 in Vol. IV of the Floral Magazine.  Intense as is the coloration of the petals in the latter plants, yet the rich velvety depth of the maroon-purple is still more striking in C. Marquis of Salisbury, which somewhat resembles C. magnifica (Floral Magazine, Vol. VIII., Pl. 453) in having a flame of claret or turkey-red along each segment of the flower. Clematis Marquis of Salisbury is a free-growing and exceedingly promising variety, apparently belonging to the (early) Jackmani type.  The leaves are pinnatisect, having ovate-lanceolate, much acuminated hairy leaflets, which are sometimes ternately divided.  The flowers are of a fine dark plum colour, remarkable for their rich velvety surface, and consist of about six sepals, which are broad and overlapping.  Its richness and depth of colour are remarkable.
The Clematis will thrive in almost any situation; all it requires is to be grown in rich deep soil, to be manured freely every season, and to be planted out in the open ground that their roots may have freedom; but should this or other varieties be required for conservatory decoration care must be taken in providing large deep pots.  In pruning, the object should be that of favouring to the utmost the development of the vigorous young shoots, which in the early Jackmani strain flower both in the year's old growth, and again later on in the summer in the young wood.  Clematis Marquis of Salisbury, received a First-Class Certificate at the meeting of the Royal Horticultural Society on the 15th of April last. 

Book  (1872)  Page(s) 126.  
 
C. MARQUIS OF SALISBURY (Jackman) .-This is a free-growing and exceedingly promising variety, apparently belonging to the Jackmanni type. The leaves are pinnatisect, having ovate- lanceolate much acuminated hairy leaflets, which are sometimes ternately divided. The flowers are of a fine dark plum-colour, remarkable for their rich velvety surface, and consist of about six sepals, which are broad and overlapping. Its richness and depth of colour are remarkable.