Looking for information on Samuel P Hallam who married Margaret E. Spargrove 16 July 1867 in Richmond Twp, Marshall co Illinois.

Samuel P. Hallam is son of William and Lydia Hallam of Nottingham Twp, Washington Co Pennsylvania (1850-60 census)

Only two children have been found in the census with their parents, ??Anna born ca 1861 and Harry G born ca 1878; according to later census, Margaret and Samuel have four children, three who survived through 1930. In 1920-30 Samuel is a widower and lives with son Harry G and his family

Am looking for Margaret Spargrove's parents and siblings.
Any information on this couple and their children will be most welcomed.

(1) Marshall co IL Marriages, 1867. Married in Richmond township, July 16th, by Rev. D. A. Wallace ... At the same time, Samuel P. Hallom and Miss Maggie E. Spargove, all of this county.
(2)1850 Washington Co PA, Nottingham Twp, 19/20, p. –. William Hallam 48 farmer PA, Lydia 40 PA, Mary 21 PA, Salathial 18 farmer PA, Thomas 17 farmer PA, Charles 14 PA, Hugh 15 PA, William 10 PA, Samuel 8 PA, Alexander 6 PA, Cynthia A 5 PA, John 1 PA
(3) 1870 Marshall co IL, Wenona Twp, Wenona PO, #97/91,p. 12. Samuel Hellam 28 town Collector $350/150 PA, Margaret 28 dress maker OH, Anna 9 IL, Bell Keeman 17 domestic servant OH