Portland, Maine Site of First Public Performance of Hawaiian Music in 1838

According to the award-winning book "The 'Ukulele, A History" published by the University of Hawai'i Press in 2012,  "As James Revell Carr points out, this [the Columbian Exposition in Chicago, 1893] wasn't the first commercial or public performance of Hawaiian music on the mainland:  Four Native Hawaiian sailors gave a concert 'in the native Sandwich Island language' in Portland, Maine, in 1838." [pages 55-56].

I know, I know.  Who knew?