This is a locomotive type 130 of French maker Cail, bought for the Panama Canal construction in 1889, and put to service there as No. 2296. Later, it became Porto Rico railways No. 15:

According to a French source, it was the loco to pull the first train on the island, and it was after the US took the island that it was converted from coal-burner to wood-burner. In 1929, Henry Ford purchased it for his museum in Dearborn. From there, after diverse troubles, it came to Chemin de Fer de la Baie de Somme, a French museum railway that restored it and runs it since 2003 as No. 2.

_{*Lunatic*, n.
One whose delusions are out of fashion.}