HUDSON STEAMSHIP CO. LTD.

Brown 1926 shows a red flag with a white H. By 1929 Brown shows the blue version, which remains in later sources; Brown 1982 says it is unlikely to be seen again.

ABC Coastal Cargo Ships defines the H159 funnel as dark blue, with a black-and-white photograph of Hudson River confirming a very broad band. Other references assign this funnel to John Hudson Fuel & Shipping.