That’s looking familiar…
On my maid patten (which has an open neck line) I would then have dropped the bodddice front neck line so it sat just above the high bust front center (about 25mm (1 inch ) above if you needed a precise figure (X1), at bust points the neck line point should be roughly in line with the bust point horizontally, and the arm pit (?) vertically (X2) . Curve through these points until you hit the shoulder line (X3). Depending on taste the beck neck line would be dropped in like manner. (X4)
The sleeve as far I could tell was a basic sleeve block, drawn in length to the widest part of the upper arm. (S1). At S1 extend lines half the bicep widest point+ a small amount of ease to S2, S3, and construct the rest of sleeve as
This is where I can’t recall what next. because as I understand it you then tweak/remove the arm scye, such that a curve is formed when the sleeve is stitched into the side at X4/ X3.
The skirt is a modified (2 part) circular skirt at an appropriate depth (L1) from the waist line of the bodice… I wasn’t sure here how to work what angles should be set up so as to draft the skirt.
Depending on taste L1 is either : Waist to Crotch+decency_factor.
On L1 to L1 mark the hip line, and extend half of hip_arc(front) to L2, and now draw a diagonal L,L2 extending it to the base line perpendicular L,L1 making
Mark length of L, L2 verticaly from L, extending to L3. This is the bottom point of the front skirt.
The next step is I think is determine from the waist arc back to a point L4 which is the pivot for the parallel arcs which are then drawn as the top and base of the skirt. … The same is done for the back skirt with the exception that it’s a curve not an arc to accomodate the need for a slightly longer back length compared with the side seams…