I should have been clearer in my response.
I agree. Sometimes retrospect can be an ugly thing.
Googling his quote brings one to this site. The quote from #387 is posted there, along with the writer's admission that he is not sure where it came from, he thinks it might be Rogers v. Bellei or one other case (which I can't find the text of online.) His quote is not in Rogers v. Bellei, and indeed, the "jus soli" portion of Rogers v. Bellei contradicts his quote, showing that considering Rogers v Bellei as the source was very inconsistent with the R v. B opinion.
And now I really should be working - so no more posts from me for a while.