Statistics for occurrence #1 of “Dr. Grafton” in article 7 of The Daily Dispatch: August 19, 1863., [Electronic resource]:

...and was swimming upon it, when a seaman shouted to him that he was drowning and could not swim. The doctor immediately pushed his oar to him and struck out for the boat. The seaman was saved, but Dr. Grafton was never heard of afterwards.
...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  

† This entity has been selected by the automated classifier as the most likely match in this context. It may or may not be the correct match.