| Generation No. 1 |
| 1. Thomas Underhill Clark was the son of (2) Edward Clarke and (3) Sarah Clarke [Paige]. He was born 1794 at Wadhurst, Sussex; christened 6th Jul 1794 at St. Alban's Church, Frant, Sussex |
| He married Martha Russell on 12th Jul 1815 at St. Peter and St. Paul Parish Church, Wadhurst, Sussex. She was born 1794 at Etchingham, Sussex. They had the following children: |
| i | Catharine who was born 1815 to 1820 Sussex |
| ii | Edward who was born 1816 Wadhurst, Sussex |
| iii | Martha who was born 1820 to 1825 Sussex |
| iv | Thomas who was born 1824 Wadhurst, Sussex |
| v | Sarah who was born 1834 Wadhurst, Sussex |
| vi | Horace who was born 1836 Wadhurst, Sussex; died 1899 Lamberhurst, Kent and Sussex |
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