When see smoke, saw for at least 5 to 10 more full strokes. Use knife point if necessary to remove coal from notch. Be careful and don't hurry, or you will destroy coal and have to start over. Carefully wrap tinder around coal, and hold in front of you and slightly above face. Then gently blow into tinder.
Smoke start to get thicker.
When smoke turn thick yellowish color, tinder about to ignite. Maybe good to place smoking tinder bundle into larger tinder bundle to lessen margin for error. Tinder bundle eventually burst into flame. Then is easy to place into firelay and have woman blow until fire going good. Make sure woman have plenty determination.