Reference:
A Short Treatise on Horticulture
Book (1828) Page(s) 146.
The last line should read: "There is also a variety with single flowers, and another with double <b>yellow</b> flowers, which are yet rare."

Periodical catalogue of greenhouse shrubs, vines, herbaceous plants, and bulbous roots: cultivated and for sale at the Linnaean Botanic Garden, 
Flushing, near New-York. (1832) p. 157
William Prince & Sons, Proprietors

546 Tea scented, of exquisite fragrance - indica odorata
579 Vanilla scented, extremely fragrant - indica odoratissima

Transactions of the Horticultural Society of London
Magazine (1842) Page(s) 254.
Observations upon the Effects produced on Plants by the Frost which occurred in England in the Winter of 1837-8. By John Lindley, Ph. D. F. R. S. &c. &c. Vice Secretary.
Read December 4, 1838.
The white and yellow China Rose, the sweet scented hybrid, Hamon, and Blairii, were entirely destroyed even in Hampshire

The phrase "the sweet scented hybrid" refers to Hamon. I.e., the sweet scented hybrid (Hamon),

This is an example of the ambiguity of commas: they may separate items in a list, and they may be used in place of parentheses. They are confusing when used in both ways in the same sentence.

Okay, I'm wondering about the variety of photos I see here. The 'Odorata' I grow, from two sources, has pink-tinged white blooms, not too double, of modest dimensions, cupped. The photos posted by the Museo della Rosa Antica show a variety that, compared to my rose, has a yellow tinge, is more double, and has rolled-back petals. The South African 'Hume's Blush' candidate is decidedly pinker than my rose. I don't make any claims for the authenticity of any of these varieties, but wished to point out that they look like different kinds.
P.S. My variety grows larger than the size given in the description, about 4' x 3' growing in poorish conditions.