I posted some information on a Jonas Defries & Sons, RD 35778, 26 June 1846 - Night lamp at
http://www.glassmessages.com/index.php/topic,51380.0.htmlDuring 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? I’m 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 Defries’s virtues either at an exhibition, or following success at one or more exhibitions.
Fred.