Conversation so far:
Who is the father of Matthew Bolton?
Matthew Boulton's father has the same name and owned a hardware business.
Where was Matthew Bolton born?
Matthew Boulton was born in Birmingham, UK.
When was Matthew Bolton born?
Matthew Boulton was born on September 3, 1728.
Which school did Matthew Bolton go to?
As the local grammar school was in disrepair Matthew Boulton was sent to an academy in Deritend, on the other side of Birmingham.
What was special about Matthew Bolton's early life?
By 17 Matthew Boulton had invented a technique for inlaying enamels in buckles that proved so popular that they were reimported to Britain and billed as the latest French developments.

Question: What cause the death of her daughters?
Self-contained rewrite: What caused the death of Mary Robinson's daughters?