Verification
Newspaper listings
Brooklyn Daily Eagle, May 26, 1882
The New York Mirror, c. June 1882
Newspaper report
The Toronto Globe, May 26, 1882
"The audience listened very attentively throughout..."
Quoted in Oscar Wilde in Canada, Kevin O'Brien, 1882
ERRATA
Complete Letters * (p172) says Wilde lectured this day in the Art Schools at Toronto. However, based on several newspapers reports of Wilde movements, Kevin O'Brien in Oscar Wilde in Canada (1882) appears to be correct that Wilde only chatted informally with students at the Institution Exhibition.
* Holland, Merlin and and Hart-Davis, Rupert, Eds. The Complete Letters of Oscar Wilde, London: Fourth Estate; New York: Henry Holt, 2000.