John and Emma resided in Denver, CO.
My source says that Charlotte is "dau Lottie b. 1911." It is hard to be certain about what this means. The most likely explanation is that Charlotte's mother was named Lottie and was born in 1811. But this would be only a guess, so I am not putting Lottie in this file until I learn more.
Marriage Notes for Martin V Schoonover and Mary Elizabeth CATLIN-507568
My source says this marriage was on 14 Nov in either 1850 or 1860. The earlier date is too unlikely to be taken seriously, so I have used 1860