Here you are:
1861
RG9. P. 633 Fol. 130 Pg. 2718 Victoria Street, Portsea
Tobias Legg Head M 49 Shipwright in HM Dockyard B. St Marys, Scilly
Thomas Humby Son in Law M 25 Joiner ~ ~ B. Hants, Gosport
Christian A ~ Dau of No. 1 M 18 Wife of Joiner B. St Marys, Scilly
1861
RG9 P. 632 Fol. 87 Pg. 1826 Copenhagen Street, Portsmouth
LEGG
Samuel T Head M 23 House carpenter B. Cornwall
Sarah M Wife M 22 Dressmaker B. Hants. Portsmouth
Albert W Son 1 B. ~ ~
1861
RG9. P. 1600 Fol. 23 Pg. 39Buzza Street, St Mary's Scilly
Elizabeth Thomas Head Wid 77 Pensioner B. St Marys
Elizabeth Legg Dau M 49 Ships carpenters wife B. St Mary
Thomas G Legg grandson 4 B. Portsmouth
So - Edth Thomas in 1851 was short, presumably, for Elizabeth and Mum was visiting Portsmouth
