1930s vintage quilt embroidered cotton flour sacks fabric, shabby antique needs cleaning

Here's a very dirty smelly old quilt which has been stored in a barn for most of it's life. It's in terrible condition and needs some cleaning and restoration work - which I think is probably worth doing as I don't often see these old embroidered quilts.

Measures about 72" wide x 86" long. No serious wear, just that hole / rip at the corner as shown in the photos. This hasn't seen much use though it's so very dirty. I'm just not an expert on washing pieces like this, and I've left it just as I found it.