Magazine of Horticulture 13: 354-356 (August 1847)
Art. IV. Descriptions of Eight New Varieties of Prairie Roses. By the Editor.

These are all Mr. Pierce's seedlings, eight in number. We have four others, which have not yet flowered sufficiently strong to give a correct description: their names are, Mrs. Hovey, a superb white; Virginia Lass; Linnaean Hall Beauty, and one unnamed. Another season they will probably bloom in fine condition. Mr. Pierce speaks very highly of Mrs. Hovey, as being a fine white, the "largest, doublest and best" of all his seedlings; it is of superb habit, with splendid deep green foliage, and, if it proves a pure white, it will be the greatest acquisition which has yet been made.

I note that 'Virginian Lass' is listed by 'Macoboy's Roses' and 'Botanica' as being a synonym of 'Mme. Sancy de Parabere'. I note also that the 1936 Rosenlexikon reference says V.L. is similar to Mme. Sancy.
'Virginian Lass' is a setigera, and 'Mme. Sancy de Parabere' is a Boursault. Were there two distinct 'Virginian Lass' , or are these the same rose?