I would place this guy somewhere in the Ohio Valley, New England or lower Canada which might open up possibilities for a more colorful bird
...Aha... that opens perspectives indeed ! :lol: Thank you Gary.

So how about the Northern cardinal, the fire truck bird which seems to be everybody's favourite ? I quote from JJ Audubon's "Birds of America" to give you an idea of where this species could be found around 1850:
"It is very abundant in all our Southern States, as well as in the peninsula of the Floridas. In the western country a great number are found as far up on the Ohio as the city of Cincinnati, and they extend to considerable distances into Indiana, Illinois and Missouri. They are found in the maritime districts of Pennsylvania and New Jersey, where they breed, and where a few remain the whole year; some are also seen in the State of New York, and now and then a straggler proceeds into Massachusetts; but farther eastward this species has never been observed. "
"The Cardinal-bird breeds in the Floridas. In the beginning of March I found them already paired in that country, and on the 8th of February near General HERNANDEZ's. In the neighbourhood of Charleston, as well as in Louisiana, they are nearly a month later, and much the same lapse of time takes place again before they form a nest in the State of New Jersey or in that of Kentucky."
"This species is very abundant in Texas, where, as in our Southern States, it is a constant resident. Mr. TOWNSEND has observed it on the waters of the Upper Missouri. According to Dr. T. M. BREWER, it is but a chance visitor in Massachusetts during summer, indeed so rare, that he never knew certainly but of one pair which bred in the Botanical Garden, Cambridge, about six years ago, and departed in the fill, with their young. The eggs measure one inch and half an eighth in length, five-eigths and a third in breadth, and are thus elongated, although the smaller end is well rounded."
"Breeds abundantly from Texas to New York. Very rare in Massachusetts. Valleys of the Mississippi and Missouri, Kentucky and Ohio. Resident from Maryland southward. "
Well, if your 19th century trapper would be in one of the above regions, then he might see a cardinal. I rest my case now, before the forum hosts slap my wrists for making this into an ornithology forum.
Good luck with the trapper,
J.