Methodist Episcopal Hymnal

Hello all! I've attached a picture of a hymnal and article I found, and the link to my Picasa page with more pictures is accessible by clicking the title of this post.

I'm wondering WHO SOME PEOPLE ARE?!?!? I have this hymnal that dates back to 1878. In it are listed 4 names of people. 2 are Reverends with the Methodist Episcopal Church from the last century. The other two, I'm not really sure... Anyone have any ideas? The names are...

Rev. T.B. Lugg
Rev. John Slater
Brother Clark
John Lowry

Thought it was interesting, and would love to hear from you if you have any info! Or if you just think it's really cool like I do.