Googling Wendelin shows a nice picture of him and mentions his activities in the late 19th century. That Post Express history of Rochester has been digitized and is available for free on www.libraryweb.org
Lawrence Merk's obit in 1919 mentions: Died at NY City Tuesday Sept 23rd (1919), Lawrence Merk, aged 59 (?) years. He is survived by his wife, Winifred (Hornsberger?), one daughter, Geraldine, one son, Lawrence Jr. of NY city, and three sisters Mrs. Rosa (Gieser?), and the Misses Magdalena and Anne M Merk of this city. (Rochester Democrat and Chronicle, Sept. 25 1919.