On microscopic examination long thick-walled cells were observed. (Fig. 1). The thick walls and tapered end walls suggest phloem fibres. The obvious material used by West Coast Indians would be cedar bark from Thuja plicata. Thus a comparison between standard of Thuja plicata was made. Fig. 2 shows the normal cedar bark. The fibres are similar in structure but the average diameter of the fibres in the woven material is 0.032 mm. and that of the standard 0.028 mm. The phloem fibres of both show denticulate cell walls (Fig. 3 & 4). The phloem fibres of both materials gave yellow reaction in IKI - 70per thousand H₂SO₄ indicating absence of cellulose. The fibres have a positive red colour in phloroglucinol indicating presence of lignin. Despite the diameter differences which are probably a result of growth difference it is shown that the woven material is Thuja plicata in origin.