Three Glaucous Macaw held at the Smithsonian linked with Thomas Page and his expedition

I have noticed that one of the three specimens of the Glaucous Macaw (Anodorhynchus glaucus) held at the Smithsonian in Washington DC is alleged to have been collected by Cpt. Thomas Page in March 1860, some four years after he apparently returned from his famous expedition on behalf of the US Government. I shall investigate this and report back.