Trinder, Anderson originated when O.J. Trinder and J.R. Anderson left the Orient Line managers Anderson, Anderson & Co. in 1874. They acquired Oliver & Wilson’s Fremantle business in 1886 and had strong connections with Federal Steam Navigation and New Zealand Shipping, managing Avenue Shipping vessels and part of the Montreal–Australia–New Zealand Line. The source gives continuation as agents to 1974 in one account and at least 1980 in another.
Keep the explicit scope label independent; no alias or company identity is inferred.