My online pages don't include much on the Martyns, because I regarded them as covered by Marianne Eastgate's pages. Looking at those again, they obviously rely heavily on the Martyn tree; they tend not to have children born after 1856/7, and have transcription errors - e.g. William Edward Martyn, a nephew of 1817 Silas Edward's, is made into two people, William and Edward.
Below is an extract from Marianne's info for 1817 Silas E's immediate family, with some notes and corrections. 1774 Thomas Martyn is the 6th of 8 children of John M & Gertrude Hiscutt - no.4 was my ancestress Mary (1770-1845), no.8 another Silas Edward (1779-1862).
[I've just counted on the Tree - it gives 53 grandchildren of John & Gertrude!]
Best wishes - Denis
4 Thomas MARTYN Dr. b: 1774 c: 16 APR 1774 d: JUN 1826
m. Sarah Darke 17 Nov 1801, Hatherleigh (SD: 1778-ca Aug 1852?)
5 Gertrude MARTYN b: 1802 d: AUG 1823
5 Elizabeth MARTYN b 1803/4 Hatherleigh
5 Sarah MARTYN b 1805/6 Hatherleigh
5 Mary MARTYN b 1807/8 St Columb
5 Thomas Darke MARTYN Dr. b: 1811 - d ca Feb 1891 St Columb
+ Mary Frances Glubb, m Liskeard ca Nov 1838
- d St Columb, ca Nov 1880, aged 65
6 Frances MARTYN b: 1844
6 Emily Lyne MARTYN b: 1853
6 Janet MARTYN - b 1845/6
6 Sydney MARTYN
6 John MARTYN
5 John MARTYN - b 1814/5, d 1882
- clergyman, Vicar of Ibberton, Dorset
+ Margaret Alner Harvey, c 6 Mar 1833, m Jun1856 Sturminster
5 William MARTYN - b 1815/6, d 1892
- doctor, in Kensington 1851, 1861
+ Elizabeth Pike, m 1854 Chelsea
6 Orlando Bridgman MARTYN - b 1855
6 William Edward MARTYN - b 1856
6 Edith Mary MARTYN - b 1857
6 Constance Elizabeth MARTYN - b 1859
5 Silas Edward MARTYN - b 1817, d ca Nov 1887
- (Edward) - warehouseman / East India merchant
+ Mary Matilda Allin, m Wandsworth 1850
6 Isabel Allin MARTYN
6 Charles Edward MARTYN
6 Henry Allin MARTYN
6 Florence Mary MARTYN
6 Alice Maud Martyn - b ca. Feb 1858 Kensington
6 Ellen Darke Martyn - b ca. Nov 1859 Kensington
6 Emily Constance Martyn - 18 Aug 1861 Kensington
6 Thomas Allin Martyn - b ca. Aug 1863, d ca. Aug 1868
6 ?Ernest William Martyn b ca. Feb 1869, d ca. Nov 1869
5 Ann MARTYN
5 Maria Darke MARTYN
+ Thomas TRELOAR, m Enoder 19 Sep 1845
6 Thomas TRELOAR
6 Charles TRELOAR
6 Edward TRELOAR
6 Louise TRELOAR