(Wahkiacum) Cathlamet, W.T. (1858). Unusual arc postmark (type 2, earliest known use) on folded letter datelined "May 17 1858" to St Helens, O.T. franked with 1857 3¢ dull red (tiny flaws) tied by two strikes of straight line Paid handstamp, Very Fine and rare. Estimate  $400 - 600. $0 (Image)