Douglas, I think that her burial was incorrectly entered in the register as Emily Woodworth. I’ve copied chunks from the 1861 and 1871 census indexes which demonstrate that the only Emily Woodworth in 1861 was Elizabeth Catherine’s 9 yr old sister, and this Emily was still alive in 1871.

********
Event Type Burial
Event Date 16 Apr 1868
Event Place Rushen, Isle of Man
Name Emily Woodworth
Age 20
Birth Year (Estimated) 1848

********
1861

WOODWORTH Edward 17 Rushen 4430 31 71
WOODWORTH Elizabeth 35 Rushen 4430 17 135
WOODWORTH Elizabeth Catherine 13 Rushen 4430 17 135
WOODWORTH Emily 9 Rushen 4430 17 135
WOODWORTH George 1 Rushen 4430 17 135

*******
1871

WOODWORTH Edwin 5 Rushen 5778 76 45
WOODWORTH Elizabeth 45 Rushen 5778 67 115
WOODWORTH Emily 19 Rushen 5778 67 115
WOODWORTH George 11 Rushen 5778 67 115

********
Just a theory.....

Jean