1813 Snugfit Mildred has a narrower leg and complete gathered waist compared to 1812 Snugfit Martha. You definitely need both patterns :)
Mildred also has a bell bottom pattern piece and fuller boxer shorts with no side seam.
There are lots of options.
There are the straight pants.
Then the bell bottoms.
Annabelle's PJ shirt was made from 1806 Snugfit Elaine just enlarged to 106%. Look for specially tailored Australian Girl pattern 2006.