On this page of the Call of the Sea guide, you will find the location of all the secrets in Chapter 3 - The Vanishing of the lady Shannon.
Chapter - Chapter 3 - The Vanishing of the Lady Shannon.
Location- in the first part of the camp.
To get to this room, you have to turn on the power.
A walkthrough for this puzzle you will find on the page - Chapter 3 - The Vanishing of the lady Shannon - Electricity.
The Can is in the chest, in the first tent on the left.
At this point, you can get an achievement!
When you examine the can you get the achievement - Marsh Cannery.