Need help finding out more information about a ceramic pitcher

I'm looking for more information about a ceramic pitcher. I have attached a couple photos. There's no stamp and only info I have is that it was possibly made with a rare type of clay. Also, unknown company (Could be Rockville, Rockford, starts with Rock).
Please help if you can. I am searching for info for a friend of mine. The above info I gave is all

 

Rockingham.

 

I'm having a bit of trouble seeing the pattern on your pitcher but I think it's the same pitcher shown in Mary Brewer's book Collector's Guide to Rockingham. I admit I'm having trouble making out the pattern in the book too but I think the bird, trees and border decoration are very much like yours. See what you think. I'd disregard the price suggestion.

YOURS


THE BOOK

 

Thanks for the help you guys. Yea I don't think my friend is going to be too happy about actual value. Looks like it only ranges around $30 or so. He assumed it was valued at $500.

 

It also has a bad chip by spout and small one on bottom and hairline cracks in several areas. It is hard to make out designs even in images online.

 

This looks like it may be the same pattern but in good condition that sold for $28. Subtract fees from that and it's a bit depressing.

http://www.ebay.com/itm/172570242071