The relative placement of the infielders is what I noticed most as the ball in play would have been a sodden lump and all defenders would be closer on average. The fact that the right side of the infield plays the lefty noticeably closer than the left side is what strikes me.Not that this isn't a great photo but the infield dirt here is little more than the straight line between bases. The 2b's position would likely place him back but still firmly on the dirt of a modern infield.
The outfielders are also playing much closer than they would today.