In 2000 H. Mather Lippincott, Jr., donated books and materials concerning organizations in which his father, Horace Mather Lippincott, participated. Included were bound manuscripts which were organized chronologically. These were processed as RG5/251, Horace Mather Lippincott Papers. The accession was sorted and cleaned. Duplicate publications were added to FHL duplicates. Minutes from Media Monthly Meeting Long-range Planning Committee from the 1970s were transferred to RG 2/ Media Monthly Meeting Records. Minutes of the Friends Social Union (H. Mather Lippincott, Jr.. was president of the organization 1970-1972) were added to RG 4/039. Historic Structures Report, the Richard Wall House, 1981, and The Jenkins Town Lyceum were added to FHL books. The Whittier House memorabilia (contents of cornerstone salvaged by HML just before demolished for Friends Center, included sampling of newspapers, publications, deeds, architectural plans, etc., 1913) added to RG 4/058, Philadelphia Young Friends Association Records.
In 2014, Mather Lippincott's widow, Margaret ("Peg") Walker Lippincott, donated additional papers which were delivered by her son and daughter-in-law, Hugh and Marge Lippincott. These were largely genealogical, family deeds, and photographs. Included were additional Horace Mather Lippincott writings, many of which were duplicate copies already cataloged, and some Mather family papers.
In 2015, vital record pages in the family Bibles which were loaned at the same time as the 2014 accession were scanned and sent digitally to the Lippincotts. In February 2016 the Bibles were shipped to the four Lippincott sons.
In 2017, the second accession was sorted into four groups: Horace Mather Lippincott papers, genealogical research, H. Mather and Peg Lippincott papers, and Lippincott family papers. Photographs and photo albums were removed to be processed as a Lippincott picture collection. Deeds were flattened and stored in oversize.
Duplicate publications and mimeographed manuscript copies were removed to return to the family as well as duplicate copies of the family trees and print proofs used in the Penn alumni publications, etc. Materials were cleaned. Duplicates that were moldy or badly damaged were removed. Family trees and rolled documents were flattened and stored in oversize.