After a trip to the salesroom at the 2015 National Barbie Doll Collector's Convention, I managed to find a Dawn doll by Topper Toys in pretty good condition. This doll did not have the green knees that many of the Dawn dolls appear to have by this age. She's from the 1970s and had a variety of male and female friends. While this doll is a little taller than all the dolls in Dolly Bureau volume 3, some of her clothes, shoes and accessories fit smaller dolls in the book.
Dawn looks pretty similar in size to the Mattel RockFlowers. Dawn is a bit taller than Picco Neemo (pictured below) and some clothing can be shared between the dolls. It seems like the shoes do not work out very well between the dolls, but Dawn shoes can be squeezed pretty tightly onto Picco feet (also pictured below).