Actually, Peter did not come over with Anna Indermuhle. He was first married to Madgalene Rufenacht. I found the immigration record that lists him, his wife and several of his children, along with there ages. You can go to my website at www.rootsteps.com
and click on Family Collections, then scroll down and click on their names. I have blogged a beginning of all of my research on Peter's immigration. It has a picture of the immigration record for reference.
As I get more time I will post more of their descendency. Let me know if you have any other questions!
Roshan Tubaugh Richards