An Examination of Two of The Changes to Raw Data That Are Included in the ACORN-SAT 2.2 Darwin Maximum Temperature Reconstruction. 

There appears to be no valid reason to lower Darwin maximums by 0.67C for all years prior to 1980 all the way back to the start of the record in 1910. The reason given is “statistical” and is based on the 4 reference stations mentioned above. (Table1) & (Figure 7).