Hugh Seymour
Hugh was born in 1759.  He died at the age of 42 in 1801.

 Anne Horatia Waldegrave
Anne Horatia was born in 1759.  She died at the age of 42 on June 12th, 1801.

 Horace Seymour
Horace was born in 1791.  He died at the age of 65 in 1856.

 Horatia Maria Seymour
Horatia Maria was born on October 17th, 1795 in St, Martin-in-Fields.  She died at the age of 57 on August 26th, 1853.