1/ documenting questionable incident in #PAGES2K (2017). In respect to Cold Air Cave, South Africa speleothem, they said that they removed "anomalous" period (1956-1976) from calibration since yielded "temperature trends contrary to other published records for last 10,000 years 
2/ when checked against original data, PAGES didn't just remove 1956-76 from calibration, they removed it from database and inserted plugged/fabricated data which better matched temperature trends in 20th century - as shown in diagram below.
3/ it's not like this incident overturns EVERYTHING. It's just that it's hard to imagine this sort of opportunistic bodge being done by anyone other than climate scientists. Remember "Briffa bodge"? Early technique to "hide the decline".
