Extra but the Duke’s only daughter - Chapter 18

Actually, sir probably would remember. They’ve done studies suggesting that young children and babies have a surprisingly long memory. They’re was one study where a baby less then 6mos was brought to a facility to do a study. 1 and 1/2 years later the child was brought back to the facility, and recognized the car ride up and was excitedly saying they wanted to go on the swings.
Three area studies suggesting that children up to 3 yo can remember as far back as 3-4 mos old. But at some point the way our brain stores memories shifts and we start to lose memories from the first few years of our life.