Conversation so far:
What lead up to Bertrand Russell's early carrer?
When Russell was eleven years old, his brother Frank introduced him to the work of Euclid, which transformed his life.
Are there any other interesting aspects about this article?
Frank and Bertrand were placed in the care of their staunchly Victorian paternal grandparents, who lived at Pembroke Lodge in Richmond Park.
Why were they placed there?
In June 1874 Russell's mother died of diphtheria, followed shortly by Rachel's death.

Question: Where was his father?
Self-contained rewrite: Where was Bertrand's father?