1850, Catherine Grace Frances, The Hamiltons, or, Official life in 1830, page 353In the days of its close boroughhood, it had owned but one mind, and that a little one ; it had now a thousand ; and each, in its own conceit, gigantic.
1922, George Thornton Flemming, History of Pittsburgh and its Environs, page 348The Gazette began before boroughhood and has continued along successive decades.
1988 April, the Editor, Spy Magazine, page 23Hmm, 'Park Slope, New York' again. That's two votes for Park Slope boroughhood. Message to residents of Cobble Hill, New York: get with it!