With A-E as desired, embroider scattered French knots onto felt square. Leave a 1/2 in. (1.5 cm) border on all sides free of embroidery.
With D take a stitch through one corner of felt square. Pull D, to create a loop. Knot ends on back of felt square.
With sewing needle and thread, and with right sides together, sew linen square to felt square, about 1/2 in. (1.5 cm) from edge, and leaving an opening for turning. Turn to right side. Fill Sachet with fiberfill and lavender. With sewing needle and thread, sew opening closed.