Newsletter  (May 2013)  Page(s) 3.  
 
Pentland also produced two noisettes, ‘Dr. Kane’ in 1856, and ‘Woodland Marguerite’ in 1859, and also the bourbon ‘George Peabody’ in 1857, a purple-crimson flower still popular until World War I.

Book  (1936)  Page(s) 548.  
 
Peabody, Georges (Bengal) Pentland 1857; Paul Joseph X ? ; vivid purple-garnet, large, double.

Book  (1906)  Page(s) 171.  
 
....Geo. Peabody, 1857;....raised by Jas. Pentland, of Baltimore.

Book  (1899)  Page(s) 71.  
 
Geoeges Peabody, Hybride de Bengale, Pentland, 1857, grenat

Magazine  (1888)  Page(s) 329.  
 
Georges Peabody, purple-crimson, large, flat cup form

Magazine  (1 Apr 1880)  Page(s) 60.  
 
[From "NOTICE SUR LES ROSES AMÉRICAINES" by H.B. Ellwanger, read at the Horticultural Society of Rochester on 29 January 1880]
Rosa Bourbonica. — (Ile Bourbon).
George Peabody (James Pentland, 1857). — Vigueur moyenne, fleurs carmin violacé.

Book  (1871)  Page(s) 350.  
 
The following are good Bourbon roses:- ...George Peabody,- cupped, purplish crimson.

Book  (1866)  Page(s) 181.  
 
The Bourbon Rose.
George Peabody is of a purplish-crimson.

Magazine  (1861)  Page(s) 55.  
 
Bourbon. — George Peabody is a beautiful rich crimson purple, apparently dwarf habited on Manetti, but a free grower on its own roots; it is a continual bloomer and a free bloomer. Its raiser has not said one word too much in its praise. A bed of it on the Manetti stock would be very gratifying.

From Florist & Fruitist, February 1861, p.57:
Roses in Dorsetshire.
I will refer therefore to the Exhibition which took place at Salisbury, after describing a few Roses new, or at least so to me.
George Peabody, from Baltimore, 4 plants on their own roots, is of very vigorous growth, of deep crimson-purple, with very thick petals, three blooms were taken to Salisbury, had been rained upon, more or less, for a week, and yet wore well, and were in the winning pan; this will be one of the greatest of favourites when better known...
JNO. Milne. Derringham, Spring Bank, Hull.