Take a look at Camping and Woodcraft by Horace Kephart.
Royce Tent: half pyramid, 7'9" high x7.5'x7.5', 4 lbs made from 'lightly waterproofed Lonsdale Cambric'[a cotton fabric, but no idea what it is].
Kephart also mentions a light weight kit:
Silk tent, down sleeping bag, cook kit, 7 lbs.
He has recipes for waterproofing wool, canvas, etc, and many ideas for light weight backpacking circa 1920.
What people used back then was silk for ultralight tents, cotton for light weight and cotton canvas for heavy.
Lightweight wool pants, shirts, and long johns are available, but sometimes hard to find. Merino wool base layers are fine.
Silk is available as light as 0.5 oz per square yard, lighter than silnylon.
For 5 season outerwear and tents, Ventile cotton is the hot fabric (5th season = arctic/antarctic winter). It's just really expensive. There's someplace in
Why hemp fabrics?? Does it have advantages over cotton or silk. Cotton has the advantage that fine woven cotton the threads expand and make it more watertight so you can make a good steep sided tent/tarp if you can find the right fabric.
Long staple Egyptian cotton is great stuff but hard to find.
http://www.tentsmiths.com/egyptian-cotton-tents.html