Conversation so far:
When was Peale married?
1762.
Who was he married to?
Rachel Brewer.
How many children did they have?
The sons included Raphaelle Peale (1774-1825), Rembrandt Peale (1778-1860).
What did he do during this time?
After Rachel's death in 1790, Peale married Elizabeth de Peyster.
Did they have any children?
With his second wife, he had six additional children.
When were they married?
1790.

Question: How long were they married?
Self-contained rewrite: How long were Charles Willson Peale and Elizabeth de Peyster married?