This pattern was entirely updated (re-edited, new photos and layout) in September 2022.

2/5/18:

Right-Facing Latvian Braid
Rnd 1: Join MC. (K1 in CC, K1 in MC) to end.
Rnd 2: (P1 in CC, bring MC yarn under CC yarn, P1 in MC, bring CC yarn under MC yarn) to end.
Rnd 3: (P1 in CC, bring MC yarn over CC yarn, P1 in MC, bring CC yarn over MC yarn) to end. Cut CC.
Rnd 4: Using MC only, M1, K to end. 57 sts.

Left-Facing Latvian Braid
Rnd 1: K2tog, K all sts. 56 sts
Rnd 2: Join CC. (K1 in CC, K1 in MC) to end.
Rnd 3: (P1 in CC, bring MC yarn over CC yarn, P1 in MC, bring CC yarn over MC yarn) to end.
Rnd 4: (P1 in CC, bring MC yarn under CC yarn, P1 in MC, bring CC yarn under MC yarn) to end. Cut MC.
Rnd 4: Using CC only, K to end.