I also acquired/rescued 40 lawn bags of books from the estate of the late Universal pictures conductor Joseph Gershenson which were left out in 1988 for trash. I took the 1,000+ books, donated half to CSUN (many were 1st editions/unsigned) who sold them at their book sale fundraiser. My late former wife created the Friends of the Library there so it was a very appropriate donation. I kept the music and history books.
Glad you kept the Sandburg books. For my late former wife's last birthday, I purchased the only remaining seven years (1916-1923) of the Owensmouth Gazette, bound by the former owner, Edgar Rice Burroughs (Tarzan author) who also founded and lived in Tarzana, CA. Since my late former wife was the historian of the San Fernando Valley (she had three urban archives exhibits, one on line by the Getty Museum), president 10 years of the SFV historical society, this was the greatest gift I could give her. Unfortunately, she died (after an 11 year systemic lupus illness) a few months later. I then had the Huntington Library make a negative and positive microfilm copy which I donated to CSUN.
Unfortunately, university libraries have greatly diminished book collections, at least not on the shelves, whose spaces are now occupied by banks of computers.