Complex sentence: On the other hand she shared her secret with very few men, not even her husband; as she wrote to a friend in the 1820s "I have not told even Nairne lest he blab".
Split into simpler sentences: On the other hand she shared her secret with very few men, not even her husband. As she wrote to a friend in the 1820s "I have not told even Nairne lest he blab".