December 18, 1859, was a Sunday and that day, at 9 PM, the 17 members gathered at the Oratory of St. Francis de Sales and wrote their names in a notebook.
It was a notebook printed in a Turin printing house with 24 sheets sewn together and horizontal lines to facilitate writing.
Here the 18 names of the first members of the Congregation were written. Their average age was 20 years.
The small notebook still exists and is exhibited in the rooms of the Casa Don Bosco House Museum in Turin.