Hello 'wesnlisa67',
The following is a link I find helpful for a lot of items, but you may find much better ones:
http://www.figurines-sculpture.com/karl-ens-bird-cross-with-e-n-s-pottery-mark.html
The mark sounds like this:
http://bodenmarken.porzellan-selb.de/porzellanmarken.php?detail=106
There are some similar items currently for sale on ebay, prices around the $200-$240 USD range.
I am not a Karl Ens expert, but if you were to ask on the US Boards, someone on the Collectibles and Art board might know something about this piece, or be able to point you in the right direction.
http://community.ebay.com/t5/Collectibles-Art/bd-p/29