There is a Walker family on pages 456-460 in J.M. Runk "Biographical and genealogical history of the state of Delaware : containing biographical and genealogical sketches of prominent and representative citizens, and many of the early settlers v. 1 (1899)"

The book is online at http://contentdm.lib.byu.edu/cdm4/document.php?CISOROOT=/FH2...

My Springers are on page 465.