The earliest Arab boycotts? (updated)

Here are the two earliest mentions I could find of Arab boycotts of Jews from the Chicago Sentinel. For some reason the JTA article is not listed in the JTA archives.

January 6, 1921 in Nablus, then known as Sichem (Shechem):

August 31, 1922:

UPDATE: There was a call to boycott Jews in 1920 - from Arabs who didn't want Palestine to be separated from Syria, which was pretty much all of them.

(h/t @mpitkowsky)