If visit Greenwich Observatory you'll see Harrison sea clocks H1, H2, and H3. I had the luck (and honor!) to meet a volunteer guide - Stephen - that knew every

If visit Greenwich Observatory you'll see Harrison sea clocks H1, H2, and H3. I had the luck (and honor!) to meet a volunteer guide - Stephen - that knew everything about clocks and explained it perfectly. When you meet him, say hello :-). My kid barely spoke English and Stephen had the patience and virtue to answer everything with a smile. Best guide I ever met.