A potholder is a quilt as you go technique where each block is quilted and bound (treated like an individual small quilt) and then joined together to make a complete quilt. This example was done in two parts or perhaps cut in half. *Potholder quilts are uncommon but most often were made in Maine or have some connection to Maine.
Quilt #2 Also from Maine - Debra Grana Collection. A wonderful sampler, c. 1860. The sashing is a fugitive purple that turns to shades of brown from light exposure. T cut out for a poster bed like this one is a strong clue to a New England origin.