That was "the trick" the Cabal got caught doing in the ClimateGate emails. They did not LIKE the proxy results for the modern era --- so they decided to just cut/paste the modern instrumentation record ONTO their proxy studies. That's the dishonesty and scam here.
LIAR!
The "trick" came from the lying scum deniers editing the emails to deliberately mislead, but you knew that already.
The full quotation from Jones’s e-mail was, “I’ve just completed Mike’s Nature trick of adding in the real temps to each series for the last 20 years (i.e. from 1981 onwards) and from 1961 for Keith’s to hide the decline.” Only by omitting the twenty-three words in between “trick” and “hide the decline” were change deniers able to fabricate the claim of a supposed “trick to hide the decline.” No such phrase was used in the e-mail nor in any of the stolen e-mails for that matter. Indeed, “Mike’s Nature trick” and “hide the decline” had nothing to do with each other. In reality, neither “trick” nor “hide the decline” was referring to recent warming, but rather the far more mundane issue of how to compare proxy and instrumental temperature records. Jones was using the word trick to refer to an entirely legitimate plotting device for comparing two data sets on a single graph.