What could this antique desk be worth?? how old is it or any info about it. PLEASE...?

I have an antique desk. i think it is a centennial desk. its mahogany. has a hidden door an indented shell looking carving and also spiral columns on each side. with claw feet. any info would be great.i couldn't put a picture on this so please email me and i will send you a pictures. me email is cappcy36@yahoo.com.thanks...ITS been a family mystery.