"Houston, we have a problem....."

I'm working on the new start for the 'not counted thread' slot on my rotation.   This is the vintage German needlepoint. 

That is one quarter of the blue yarn.  The scissors are pointing to where the one quarter point of the canvas is.   Yep, not nearly enough yarn.    

Here's the entire sky and clouds area

Since I don't have a cover page or instructions and this kit is a MINIMUM of 35-40 years old and maybe much older, there's absolutely no chance of getting matching materials.  A close-ish color match done in 'cloud / puddle' shapes in the center top around the church tower and over on the left side would probably look OK and give enough coverage to eke out the yarn.  Even a summer sky has various shades of blue, after all.

Luckily DMC still makes 4 ply wool tapestry yarn.  However, I don't have a color card for the wool.  So I just sent an order off to123Stitch for several 8-yard hanks of various pale blues.  (And three shades of bright green just in case it's not only the one color that's short.)  I did check the stash, but the only blue tapestry yarn I have is way too dark for a summer sky.

I'm guessing that if this kit is older (post war up to the 1970s) that the materials are not generous due to material shortages and therefore it was meant to be done in half cross, not continental stitch.  Half cross puts a lot less yarn on the back of the project and also distorts the canvas badly due to all the stress on the ground being in a single diagonal direction.  Continental stitch done basketweave style (which is the technique that I'm using) is so stable that you barely need to block the canvas when done since it distributes the stress of the stitches equally in both the horizontal and vertical directions.

You know, I am going to be happy when I finish up the vintage projects.  It seems like every one of them has materials issues!