It was in the Pacific Historical Review vol. 9.1 (1940) pp.66-70. I can’t link it because I got it through my college library’s members-only database.

If you look at the two images of the document linked in this post, you’ll see that a large section at the bottom of page two is whited out.

That was done because it wasn’t part of Taft’s telegram – it was a note scribbled by people in the State Department that mentioned China was boycotting American trade goods as a protest to some decision the US government had made concerning China – I think concerning immigration…

Another key piece of information — this often called “secret treaty” was marked only “confidential” by the State Department and was placed in their “miscellaneous correspondence” section of Record Group 59: General Records of the Department of State.

So, either the State Department didn’t put much interest or weight into this “treaty” — or — it was a brilliant cover up: (not labeling it “secret” or “top secret” and “burying it” in an obscure section of the historical record where it could remain “hidden.”)