Here are several Steve Neal photos (taken by his father Frank) of the Trout mills at the head of Cliff Gulch during the 1950s. We visited this area on our Silver and Sapphire trip in June.
The building on the left is the Trout Manganese mill and the mine dump belongs to the Trout mine.
On the left is the Trout Manganese mill with the Silver Mill on the right.
Here's a closer view of the Trout Silver Mill, a flotation mill for recovering silver from the ore of the Algonquin and nearby mines.