Not sure if you are still here, but I have info on the Lamb's from Ridgway, IL (where my Grandfather was from). I don't have alot of "paperwork" to back it up, but would be interested in sharing information (if I have anything new that you haven't already seen).
I have researched the Lamb family for quite a few years and I can let you have some information about the Lambs of Illinois as far as the family I am researching , but I do not have enough information to tie to your Lamb family. The family I am researchng first lived around Crawford County, 70 miles north of Gallatin County where your Lambs are from. They then moved to Hancock County in Pontoosuc. Finally many went west. The one family I can tell you about is William Lamb who married Isabella Lamerson. They both died in Crawford County, one in 1852 (William) the other in 1872 (Isabella). I have the Illinois Statewide Death Index 1916- 1950 for the name Lamb. The Lambs listed in Gallatin county are Elizabeth Bean Lamb (Ridgeway TWP) death on Dec 31, 1921 There are others listed - George Raphael Lamb, Joseph Lamb,Mary Lamb. Let me know if any of these names are from your family of Lambs. I will try to attach a gedcom file for the Lambs I am researching. Le me know if you can read it
I am searching for any Lambs that are from Ridgway, or Shawneetown, IL, they will be my family and ancestors. I would appreciate any help.