Website/Catalog  (1949)  
 
"DOUBLE YELLOW SCOTCH - a paler yellow than Harison's Yellow, dwarfer, and with a finer and denser growth. Needs snow cover in our climate, but usually dwarf enough to get it."

Percy Wright Catalogue - Hardy and Semi-Hardy Roses - ca 1949 p. 9

Book  (1936)  Page(s) 140.  
 
The following varieties I have not yet found, but as they may be in cultivation I give descriptions from other authors which will help in their identification.
William's Double Yellow. Sweet's Flower Garden, 353. Very double, 3 in., deep yellow, fragrant, styles hairy. Pedicel smooth, sepals winged, prickly. Leaves dark grey green, stipules glandular. Wood brown, many straight prickles. Raised by Mr. Williams, of Pitmaston, well known as the raiser of Pitmaston Duchess Pear. It came from a seed of the Yellow Austrian Briar.

Book  (1936)  Page(s) 216.  
 
Double yellow plena (lutea) Williams ? ; light straw-yellow, medium size, semi-double, cup form, floriferous, growth 7/10, bushy. = Hoog's straw coloured. Sangerhausen

Book  (1936)  Page(s) 351.  
 
Hoog's Strawcoloured (lutea) Hoog ? ; straw-yellow, double. = Double yellow pl.

Book  (1910)  Page(s) 255.  
 
Double Yellow R. lutea (Williams): flowers bright yellow, of medium size, double; form cupped; habit branching; growth moderate. An abundant and early bloomer; requiring but little pruning. A good seed bearer. Raised by Mr. Williams of Pitmaston.

Book  (1899)  Page(s) 53.  
 
Double yellow plena, lutea, Williams, jaune paille

Book  (1899)  Page(s) 79.  
 
Hoog's Strawcoloured, lutea, jaune

Magazine  (Jan 1887)  Page(s) 13.  
 
Souvenir des Roses Anciennes
Oubliées ou suppimées par les Horticulteurs et Amateurs de ce beau genre.
Rosiers Capucines ou Rosa Lutea.
Double Jaune (ou William's double Yellow) (Guérin), moyenne, double, en coupe, jaune vif, obtenue par M. William, de Pitmaston (Angleterre).

Magazine  (13 Sep 1884)  Page(s) 6:330..  
 
Williams’ double yellow Rose—I have sometimes seen this named Persian Yellow, but both in flower and habit of growth it greatly differs from that variety. The yellow Rose to which I refer was raised by Mr. Williams, of Pitmaston, about 1826, and was said to have been raised from the single Austrian Brier. This Rose is rarely to be found in Rose lists, and there must surely be some reason for the omission, as the tree is very distinct from the Persian or Harrison’s Yellow; the flowers are larger and it continues longer in flower. I would be glad to know the cause of this old-fashioned Rose falling out of the lists of Roses worth growing.— C.

Book  (1880)  Page(s) Annex, p. 39.  
 
lutea, Double yellow, plena, Hoog's straw-coloured (Williams), light straw yellow, medium size, semi-double, flat cup form, rich and early blooming.