Here are a few references from sources I can't find amongst the HMF publications:

From 'Garden Favourites: their history and general management in all seasons' by Shirley Hibberd, 1858, p.182:
A List of Twenty First-Class New Roses (1856)
Hybrid Perpetual.
Bacchus, crimson. A great improvement on Geant des Batailles.
https://books.google.com/books?id=zFQDAAAAQAAJ


From 'The Rural annual and horticultural directory', James Vick, Publisher, Rochester, N.Y., 1856, p.92:
Several novelties have been received by our florists, which are worthy of notice. The following Hybrid Perpetuals are represented as superior: personally we cannot say whether they merit the high ecomiums passed upon them. Another season will test them more fully.
Bacchus -- A seedling from the Giant of the Battle, is similar in habit to that favorite rose, but of a brighter color.
http://catalog.hathitrust.org/Record/009189113


From 'The National Garden Almanack' for 1853, London, p.60:
Roses.
Bacchus (Paul). -- Quite as bright as its parent Géant des Batailles, but larger and more double, with less disposition to mildew in Autumn.
https://books.google.com/books?id=t_FNAAAAYAAJ


From 'The Gardener's Assistant by Robert Thompson, 1859, p.720:
Hybrid Perpetual Roses
Bacchus (Paul) -- Bright, crimson scarlet.
https://books.google.com/books?id=6AQbAAAAYAAJ


From 'The Agricultural Gazette', 1 May 1858, p.370:
[Advertisement]
Benjamin R. Cant has much pleasure in offering the undermentioned NEW ROSES. [...]
Also the following new ROSES of last year at the prices stated...
Hybrid Perpetual.
Bacchus (Paul's) 3s
The usual discount to the Trade.
St. John's Street Nursery, Colchester.

Thanks,
Virginia