Hi
there are 6 x Robert Williams, only one has a birth year; 1813, licenced 1836 retired 1885 died 1889.
the others as follows
1. lic 1790 died 1803
2. lic 1810, died 1849
3. lic 1819 ret 1859 died 1860
5. lic 1837 died 1837
6. lic 1850, ret 1886 died 1891.
Edward does not appear: only pilots are listed.
hope this helps