My daughter is beginning a Baltimore Album Quilt(BAQ). Today we were looking at books and reading on line and I have a question I cannot find an answer for, please help me. What constitutes a BAQ block? Are there set blocks as in Dear Jane, is it any applique block, floral appliques- one source states it is floral appliques, but can also be eagles and historic landmarks. So, what are they? Are there specific patterns? Thank you.