Adelaide, Australia - instant warming, just add GISS!

While gathering data to refute the "Hottest Oz summer EVAH" claims from the BOM and Climate Commission, and having already found no records broken while trekking through GISS data, I came across the following chart for Adelaide.

 ....... and thought I'd compare it with unadjusted data:

Instant warming! Warm the present and cool the past. Here are the two plotted together

The two plots "pivot" about 1960, where they coincide. Apart from the obvious one, I have a question - just who was flying from Adelaide Airport in 1881?