per Mary Frost Jessup’s History of the Jessup Family in Montrose, Pennsylvania

1900FCI DSD Jessup and family; United States Federal Census > New York > New York > Manhattan > District 197; image 8 of 21 @ancestry.com; Source Citation: Year: 1900; Census Place: Manhattan, New York, New York; Roll: T623 1089; Page: 4B; Enumeration District: 197.
Household Members: Name Age
David S D Jessup 30
Maud Jessup 28

1930FCI DSD Jessup and family; United States Federal Census > New York > New York > Manhattan (Districts 501-750) > District 517; image 4 of 28 @ancestry.com; Source Citation: Year: 1930; Census Place: Manhattan, New York, New York; Roll: 1560; Page: 2B; Enumeration District: 517; Image: 675.0.
Household Members: Name Age
David Jessup 60
Maud Jessup 59
Mary Jessup 27
Betty Jessup 22
David Jessup 18