Subject - 223 - The True Humorist
Spencer Heath Archive Item 223 Pencil notes on notepad paper for a talk to be…
Subject - 393 - Consider The Erg (Thou Sluggard)
Spencer Heath Archive Item 393 Penciling by Heath on notepad paper No date …
Subject - 457 - Relativity Made Plain
Spencer Heath Archive Item 457 Page typed by Heath No date Through many…
Conversation - 543
Spencer Heath Archive Item 543 Random taping by Spencer MacCallum on the occasion of his…
Conversation - 615 - Uncle Will
Spencer Heath Archive Item 615. Random taping by Spencer MacCallum from conversation with Heath while…
Conversation - 757
Spencer Heath Archive Item 757 Verbatim note by Spencer MacCallum from conversation with Heath about…
Conversation - 758
Spencer Heath Archive Item 758 Verbatim note by Spencer MacCallum on the occasion of Heath…
Conversation - 812
Spencer Heath Archive Item 812 Verbatim note by Spencer MacCallum of a pun by Heath…
Conversation - 820
Spencer Heath Archive Item 820 Verbatim note by Spencer MacCallum of a pun by Heath….
Conversation - 831
Spencer Heath Archive Item 831 Verbatim note by Heath’s grandson, Spencer MacCallum, from conversation with…