 This enterprise was owned by the Southern States Lumber Company under the supervision of himself and Oscar Williams, its superintendent, and later included a dairy that eventually developed one of the South's premier herds of Jersey dairy cattle.With consolidation of Florida state schools in 1905, Yonge was appointed a member of their Board of Control, the governing body of the state university system of Florida.He served, except for one term, until his retirement in 1933 at the age of eighty-three, and was its chairman for the last twenty years.