I have a picture " The Blue Boy" front right bottom corner (Litho USA) and left front bottom corner (1809) By Thomas.Gainsbough. I also have a picture 'Pinkie the girl that goes with.. " The Blue Boy" painted by Thomas.Lawrence. I found on (Pinkie) the Front of the Pinkie picture in the front left bottom corner (Litho USA) and front right bottom corner 4 numbers small numbers (2633) The pictures are beautiful, looks very old. The pictures look to be oil, or water color... Very well preserved pieces! Is there any value ?