First guess - a ladies class on ceramics BUT
second guess - I doubt there would be that many pieces spread over space and time -
There are ceramics that are called "Studio". They represent that part of the art between talented (I say ladies) who decorate greenware, and the "biggies" like McCoy and the like.
Value? Well done animals, especially wild life, can range from $10.00 per piece to $25.00 per piece. And more. Condition counts.
Black Hills says Dakota's to me. Perhaps google for -- ceramic art black hills-- and sometimes you just have to love the artist for what she did. I personally wanted a ceramic horse - just for part of a decor I had in mind (my computer room, all Western and wildlife) - I could not find one I could afford - mostly because they went for the "and more" price. Best wishes, KB