Muslin
1. A cotton fabric made in various degrees of fineness and often printed,woven, or embroidered in patterns, especially a cotton fabric of plainweave, used for sheets and for a variety of other purposes.
“I set you down on the little table and figured if I got a piece of muslin the bugs and things wouldn’t get to you.”(Pg 109 in PDF)
Reading this it seems like muslin is some pant or bug repellent. I guess she was going to use it to cover Denver to keep the bugs off her.
She
