1845: General George J. Roskruge, who served four terms as Pima County Surveyor, three terms as City Engineer of Tucson and was unanimously elected the first President of the Association of Civil Engineers of Arizona, is born.

1903: Mason Greenlee, pioneer from Kentucky for whom Greenlee County is named, dies.

1904: Sister Euphrasia, one of seven Sisters of St. Joseph of Carondelet, who came to Tucson in 1870 from Missouri, dies.

1907: The Western Federation of Miners attempts to organize and strike the mines at Bisbee without success.

Want to share an important event from Tucson's history? Email it to krumore@azstarnet.com.