The history of this rapid growth says that he was not unlike other children until the third year, when after wading in a small stream several hours he was taken with a violent chill, after which his voice began to change and his sexual organs to develop.
Blanc quotes the case described by Cozanet in 1875 of Louis Beran, who was born on September 29, 1869, at Saint-Gervais, of normal size.

At the age of six months his dimensions and weight increased in an extraordinary fashion.

At the age of six years he was 1.28 meters high (4 feet 2 1/3 inches) and weighed 80 pounds.

His puberty was completely manifested in every way; he eschewed the society of children and helped his parents in their labors.

Campbell showed a lad of fourteen who had been under his observation for ten years.