Jordy's square-bottomed bag tutorial at Craftster is gold! Even I ended up with a serviceable receptacle for my belongings, above. The fabric is a cotton twill, with colors inspired, I'm embarassed to admit, by the honeycrisp apple so effusively praised yesterday on this site. I'll install a snap, and maybe some applique (though I should have done that before putting the lining in), and it will be ready to go - thanks, Jordy!
Now, I promise, this is my last project (and last post) today. For some reason I haven't been able to keep still, but now I'm gonna try.