I'm confident that Daly coined the "Fine Damascus Steel" terms. With that text, could be possible that C. Paubel thought that Porussia needed to be paired with the "Fine Damascus Steel" when sent to a client in the U.S. of A. 1811 is the earliest publication where I've found Porussia to be contained. The following text is from Edinburgh Encyclopedia Vol. 16 of 1832:

"PRUSSIA, formerly a duchy, but now a powerful and extensive kingdom in Europe, is thought by some to have derived its name from its vicinity to the vast country of Russia. The Sclavonic word po signifying near or adjacent, the district which Prussia originally comprehended was in reference to Russia, as is supposed, denominated Po Russia, a term afterwards softened into Prussia. Nor is this derivation of names entirely fanciful or unprecedented. The river Elbe in the Sclavonic speech, was termed Labe; and hence, on the principle referred to above, the tribes which inhabited its banks were called Po-Labae, or Polabae. The word Prussia, however, whatever probability there may be in the foregoing etymology, has been traced by others to a different source, and has been supposed to be obtained from the Prusi or Pruzi, a Sclavonic people, whom ancient chroniclers mention as inhabiting a portion of the country which we arc now considering. In which of these conjectures the greater confidence may be placed, it is now too late to determine; but it may not be uninteresting to state, that the former, namely the derivation of the word from Po and Russia has obtained the sanction of a late illustrious king of Prussia, (Frederick the Great,) in his Memoirs of the House of Brandenburg."


Kind Regards,

Raimey
rse