1. Alan Gregg in service uniform during World War I Creator: Langfier Studios Date: [1918] Genre: Photographic prints
3. Letter from Alan Gregg to his father Creator: Gregg, Alan Date: 4 November 1917 Genre: Letters (correspondence)
4. Letter from Alan Gregg to his parents Creator: Gregg, Alan Date: 13 October 1917 Genre: Letters (correspondence)
5. Letter from Alan Gregg to his father Creator: Gregg, Alan Date: 28 August 1918 Genre: Letters (correspondence)