Happy Fourth! 
Seems a stroke of genius to fit in a 15 x 15 grid
THOMASJEFFERSON across the middle and then cross that with
THEDECLARATION and
OFINDEPENDENCE. (Note the interesting grid structure.)

Working
JOHN and
ADAMS into the grid is a bonus.

There even was a riddle:
What can’t be parted after it’s departed? HAIR

As this is a Monday, it was also made easy to solve.
The only stain was OST, but even there the clue was good, “East, to Ernst.” [I would have gone with “Bone, comb. Form.”]
RATING:

Three grins = Excellent: Loved it; Two grins = Good: Enjoyed it; One grin = Satisfactory: A bit bland for my taste; One teardrop = Unsatisfying: No fun