Above: All emblems from chapter 3
Emblem 1: Once you’re on the main street, look for some clothing stands to your left. Check among the belts at the back to find an emblem.
Emblem 2: You’ll pass through a building and be back on the main street. Notice the burning green van in front of you. Loop around to the other side of that van, where you’ll find an emblem.
Emblem 3: You’ll find this emblem while atop the moving bus. When the bus stops, face the direction in which it was heading and look a bit to the left.
Emblem 4: After witnessing the plane crash, Ada will leap from the train. Move forward into the open building and head down the stairs. It’s a dead end, but on the ground in the lower right corner behind the crate is an emblem.