The American Genealogist, vols. 7 & 8, Series: Vols. 7 & 8 @ per Barbara J. Fricke. Eltred or Eltreth, Baron of Kendal
The cited information was published by 1891-1892 (Ref: per Barbara J. Fricke. Eltred or Eltreth, Baron of Kendal) The author/originator was J. H. Round, R. E. G. Kirk.