Jack Gibson
230 Elizabeth St Surry Hills
"In a peculiar event, a group of Easts players that included budding front-rower star Jack Gibson left the club during the [1954] season and went bush to play for Grenfell. Gibson and a couple of others had connections with a famous but illegal Sydney institution, Thommo's Two-Up School, and quietly left town when the temperature around Thommo's became rather too warm due to increased pressure from the authorities" - 'A Centenary of Rugby League'.
For the record, Gibson's last match in '54 was a round nine match, on June 6, against Newtown at Henson Park.
According to Rugby League Project, just one other first grade player from Easts played their last game of the season that day, Gibson's fellow prop Allan Wilson.

