Article (magazine)  (Jan 1955)  Page(s) 13.  
 
There were also hundreds of lilac pinks, magenta. pinks and plain magentas, most of which were very unattractive. Many closely resembled Banksi. Typical varieties were 'Archduc Ludovico,' 'Athlete,' 'Beaute de Twickel,' 'Jules PirIot,' 'La Ville de St. Denis,' 'Morris,' 'Princess Louise,' 'Reine Amelie,' 'Reine des Fleurs,' 'Triomphe de Vandermaelen,' and 'van Houttei.' All these varieties proved, in Holland and France, easy to propagate in comparison with the later introduced Japanese varieties. Which varieties bearing European names were actually raised from seed in Europe and which were Chinese varieties renamed is not too definitely established.

Book  (1928)  Page(s) 249.  
 
Tree Peony Check List
* Beauté de Twickel. Double. Eugene Verdier Fils Aine 1869; Louis Van Houtte 1873; A. Dessert 1899; Louis Paillet 1889.

* Presumed to be in commerce, 1927.

Website/Catalog  (1903)  Page(s) 26.  
 
Pæonia Arborea (Tree Peonies)
The Tree Peony is really one of the finest plants available for the garden or the conservatory; it is quite hardy and does well under the simplest treatment. The smallest one will flourish in the most astonishing manner, bearing blossoms from 6 to 8 inches across, which will increase every year in beauty and size. In colors, the flowers range in great variety, from a white to a nearly reddish black. [...]
Price: Two-year old, named varieties, purchaser's selection, $1.25 each, $12.00 per dozen...
Beaute de Twickle. Vinous rose, very large petals, extra.

Magazine  (30 Oct 1897)  Page(s) 411.  
 
Les Pivoines.—M. Ernest H. Krelage publie, dans le « Tijdschrift voor Tuinbouw » une intéressante étude sur les Pivoines, dont la maison Krelage et fils, de Haarlem, possède une collection renommée. [...] Comme bonnes variétés, il mentionne:
Beauté de Twickel, rouge cerise nuancé de violet vif...