Hi Jon, The Staffs, Shifnall is where Richard says he was born for the 1861 census. The problem is that Shifnal is in Shropshire...but very close to the Staffordshire border and it would not be unusual for an ag lab to move to the coal mining area for work. Now as far as tracing Richard and Mary's birth...I do believe they are both on the IGI LDS site..... http://www.familysearch.org/Eng/Search/frameset_search.asphttp://www.familysearch.org/Eng/Search/frameset_search.asp
There is a Richard Pelow born 20 May 1809 Shifnal. Parents William and Mary. If you do a parent search on IGI using William Peplow and Mary you will see that Richard had brothers and sisters born in Shifnal.
There is a Josiah Moss born 26 April 1818 Sedgley. Parents Samuel and Mary. If you do a parent search using Samuel and Mary you will find Mary Moss (Richard's wife) born 1814 Sedgley, Staffs. Also Mary's siblings.
I think I saw William and Mary Peplow on the 1841 census in Shifnal....let me know if you want me to transcribe it for you. If you need more help you can email me at mrsdief (at) earthlink (dot) net