December 29, 1884 Cumberland Presbyterian Church. Unable to find location.  

Interviewed: "Mark Twain Gets Shaved", Pittsburgh Penny Press, 29 December 1884, p4  In "Mark Twain: The Complete Interviews" (#27) 

Monongahela House  "Talk with Twain" Pittsburgh Chronicle, 29 December 1884, p1. (#28)  Mentions that the location of the church is on Sixth avenue. 

"Mark Twain" Pittsburgh Post, 29 December 1884, p4 (#29)  This interview apparently took place on the evening of the 28th just after Twain had arrived from Philadelphia. The previous two were apparently conducted on the morning of the 29th as Sam was being shaved and barbered.