Sam and Cable gave a matinee reading in Boston [Turner, MT & GWC 59].  I can find no reference to this show other than Fears' mention,

November 15 Saturday – The Boston Daily Advertiser touted George W. Cable as a southern gentleman, Sam as a Connecticut resident—adding the Civil War reconciliation aspect, a “literary bridging of the bloody chasm” and a “rostrum of rapproachment of Louisiana and Connecticut” [Lorch 164].

Sam and Cable gave a matinee reading in Boston [Turner, MT & GWC 59].