<Tr> <Td_colspan="2"> </Td> <Td_colspan="2"> </Td> <Td_colspan="2"> </Td> <Td_colspan="2"> </Td> <Td_colspan="2"> </Td> <Td_colspan="6"> Clement </Td> <Td_colspan="2"> </Td> <Td_colspan="6"> Beatrix Somerton </Td> <Td_colspan="2"> </Td> <Td_colspan="2"> </Td> <Td_colspan="2"> </Td> <Td_colspan="2"> </Td> <Td_colspan="2"> </Td> <Td_colspan="2"> </Td> <Td_colspan="2"> </Td> <Td_colspan="2"> </Td> <Td_colspan="2"> </Td> <Td_colspan="2"> </Td> <Td_colspan="2"> </Td> <Td_colspan="2"> </Td> <Td_colspan="2"> </Td> <Td_colspan="2"> </Td> <Td_colspan="2"> </Td> </Tr> <Tr> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td_colspan="2"> </Td> <Td_colspan="2"> </Td> <Td_colspan="2"> </Td> <Td_colspan="2"> </Td> <Td_colspan="2"> </Td> <Td_colspan="2"> </Td> <Td_colspan="2"> </Td> <Td_colspan="2"> </Td> <Td> </Td> <Td> </Td> <Td_colspan="2"> </Td> <Td_colspan="2"> </Td> <Td_colspan="2"> </Td> <Td_colspan="2"> </Td> <Td_colspan="2"> </Td> <Td_colspan="2"> </Td> <Td_colspan="2"> </Td> <Td_colspan="2"> </Td> <Td_colspan="2"> </Td> <Td_colspan="2"> </Td> <Td_colspan="2"> </Td> <Td_colspan="2"> </Td> <Td_colspan="2"> </Td> <Td_colspan="2"> </Td> <Td_colspan="2"> </Td> <Td_colspan="2"> </Td> <Td_colspan="2"> </Td> <Td_colspan="2"> </Td> </Tr> <Tr> <Td_colspan="2"> </Td> <Td_colspan="2"> </Td> <Td_colspan="2"> </Td> <Td_colspan="2"> </Td> <Td_colspan="2"> </Td> <Td_colspan="2"> </Td> <Td_colspan="2"> </Td> <Td_colspan="6"> William I (1378--1444) </Td> <Td_colspan="2"> </Td> <Td_colspan="6"> Agnes Berry (d . 1479) </Td> <Td_colspan="2"> </Td> <Td_colspan="2"> </Td> <Td_colspan="2"> </Td> <Td_colspan="2"> </Td> <Td_colspan="2"> </Td> <Td_colspan="2"> </Td> <Td_colspan="2"> </Td> <Td_colspan="2"> </Td> <Td_colspan="2"> </Td> <Td_colspan="2"> </Td> <Td_colspan="2"> </Td> <Td_colspan="2"> </Td> <Td_colspan="2"> </Td> </Tr>

What makes the paston letters a primary source