First, there were SEVENTY t-shirts in the duvet cover.  And, quickly, rushing, but as promised, here are the pants I made:

Picture not the best, but you can see the fullness of the leg, the nice drape.  I used leftover sashing from the duvet cover to make the tie.

My one mistake was to sew the casing closed prior to making the buttonholes.  Next time: make buttonholes first! Then sew casing shut.

And, BTW, I had a Linen Bonanza at my favorite thrift store a couple of days ago.  This top was found then.