The trumpet marine is a stringed instrument having a triangular-shaped body or chest and a long neck, a single string raised on a bridge and running along the body and neck. It was played with a bow.
This text comes from a footnote on a diary entry in the 1893 edition edited by Henry B. Wheatley.
Tromba Marina (Trompette Marine) -- sound and aspect
Pepys wrote 24 October 1667: "we in to see a Frenchman, at the house, where my wife’s father last lodged, one Monsieur Prin, play on the trump-marine, which he do beyond belief; and, the truth is, it do so far outdo a trumpet as nothing more, and he do play anything very true, and it is most admirable and at first was a mystery to me that I should hear a whole concert of chords together at the end of a pause, but he showed me that it was only when the last notes were 5ths or 3rds, one to another, and then their sounds like an Echo did last so as they seemed to sound all together. The instrument is open at the end, I discovered; but he would not let me look into it, but I was mightily pleased with it, and he did take great pains to shew me all he could do on it, which was very much, and would make an excellent concert, two or three of them, better than trumpets can ever do, because of their want of compass." http://www.pepysdiary.com/diary/1667/10/24/
Images from The Pressler Gallery - National Music Museum
Trumpet Marine (Trumscheit), Switzerland, ca. 1675-1750
Chart showing the number of references in each month of the diary’s entries.