There is, of course, the possibility that Catherine Carey was not simply Elizabeth’s cousin but also her half-sister but there is insufficient evidence to draw any satisfactory conclusions. It is however safe to say that Sir Francis was close to Elizabeth. His wife was a good friend of the queen’s as well as being a relation. So close was his relationship that Sir Francis was able to express his belief that keeping the Scottish queen in England was a disaster.
As a determined Protestant his career suffered a severe reverse upon the accession of Mary Tudor. He was such a determined Protestant that he went to Germany rather than live under Catholic rule.
Unsurprisingly his career resumed once Elizabeth ascended the throne. In addition to becoming a privy councillor he also resumed his parliamentary career. He worked for the queen in Ireland and received jobs within the queen’s household such as Treasurer. The image shows Sir Francis holding a white staff showing his role as officer in the queen’s household.
In May 1568 Mary Queen of Scots arrived in England. Knollys was sent north to act as her gaoler. His reputation as puritan made him naturally suspicious of the Scots queen. However, her charisma soon won him over, though he never let down his guard while he had care of her in Carlisle Castle and later in Bolton Castle. In fact he was so worried about security that he sent the plans of Bolton Castle and his security provision to Cecil for approval. He taught the queen English and read the English Prayer Book with her as well as discussing his faith – a matter which caused Elizabeth to write a letter chastising his behaviour.
On January 20th 1569 Knollys received orders to take Mary to Tutbury Castle and hand the royal prisoner over the Earl of Shrewsbury who would take over Knollys’ role of gaoler. Sir Francis remained with Mary until February when his wife died.
Sir Francis died in 1596 after a long and illustrious career as a politician and adviser to the Tudors.