1Thomas Jefferson to Marcus Dyson, 19 May 1816 (Jefferson Papers)
Dyson, Marcus; underwater breathing apparatus of [index entry]
2Marcus Dyson to Thomas Jefferson, 6 May 1816 (Jefferson Papers)
Dyson, Marcus; underwater breathing apparatus of [index entry]
3Enclosure: Marcus Dyson’s Drawing and Description of a Device for Breathing Underwater, [ca. 6 May 1816] (Jefferson Papers)
Dyson, Marcus; underwater breathing apparatus of [index entry]