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a7ff9bc7 | 1 years ago (raw) | root | parent | reply | flag 
 @b4c50e1b Let me see if I can find out. I meant to check before I shared but forgot.
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John Carlos Baez | 1 years ago (raw) | root | parent | reply | flag 
 @49f821b2 - thanks!  With your picture of lighthouses of the UK my readers had fun locating the more mysterious lighthouses.