Hi,
It would appear Robert died only a year after arrival

Death
1887/C1656 Robert Hollett (father)William Hollett (mother)Jane - ** born England aged 31 years

1861 Census
1861 England Census
about Robert Hollett
Name: Robert Hollett
Age: 7
Estimated Birth Year: abt 1854
Relation: Son
Father's Name: William Hollett
Mother's Name: Jane Hollett
Gender: Male
Where born: Bradninch, Devon, England

Civil parish: Bradninch
Ecclesiastical parish: Exeter
Town: Bradninch
County/Island: Devon

Household Members: Name Age
William Hollett 37
Jane Hollett 39
Sarah Hollett 14
Robert Hollett 7
John Hollett 4
William Hollett 2

Kellie