Larry O'Toole (1909 – April 10, 1951) was a Rockport, Massachusetts based adventurer, visual artist, and muralist. For a time, he was the official artist of the U.S. Coast Guard. He also painted several murals, known for their 'salty humor,' for American naval bases. At least one is in the Boston Navy Officer's Club. From 1938 – 1939, O'Toole, also an accomplished sailor, manned movie star Sterling Hayden's square-rigged brigantine, the 'Florence Robinson,' on a voyage to Tahiti. O'Toole made few maps, but his Salty Map of Cape Ann is a notably fine example of mid-20th century pictorial mapmaking.