Best wishes for Whitehead's birthday.
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Whitehead's Lost Papers
Document Item Type Metadata
No date, but likely for Whitehead's 80th birthday (1941).
Ballantine, Florence, "Letter from Florence Ballantine to Whitehead," LET1141, Whitehead Research Library, accessed December 8, 2022, http://wrl.whiteheadresearch.org/items/show/2367.