I posted some information on a Jonas Defries & Sons, RD 35778, 26 June 1846 - Night lamp athttp://www.glassmessages.com/index.php/topic,51380.0.html
During the discussion on that post, my reply#11 gives a brief overview about Jonas Defries and Sons.
Do you have any more photos of the poster showing it in more detail, please? Iím particularly interested in the illustrations of their lamps, but otherwise a transacription of some of the text would be helpful. The poster looks to be extolling Defriesís virtues either at an exhibition, or following success at one or more exhibitions.