"I have a 36" x 36" original abstract paining on canvas which is an abstract piece in bright orange, yellow, and black which appears to be from the 60's r 70's and it is signed GILBERT in block letters but i cannot figure out who this is or what it may be worth. I also have two etchings from the 1920's of a German town but i cannot read the signature is there a way for me to submit pictures??? Thank you"