For want of a swab

For want of a nail the shoe was lost;
For want of a shoe the horse was lost;
For want of a horse the battle was lost... —Unattributed
from Fifty Famous People by James Baldwin^[3] (see Wikipedia, "For Want of a Nail", visited 5/1/20)

For want of a swab the test was lost;

For want of a test the person was lost;

For want of a person the county was lost;

For want of a county...