This chaplet consists of three groups of four beads each. A large bead separates each group, and a medal of the Immaculate Conception is attached to the end. It was composed by St. John Berchmanns, S. J. and recited by him daily to obtain, through the intercession of Mary, the grace never to commit any sin against the virtue of purity.

How to say this chaplet:
(Make the sign of the Cross) In the name of the Father and of the Son and of the Holy Spirit. Amen.

On the first beads:
Blessed by the Holy and Immaculate Conception of the Blessed Virgin Mary.
(Our Father.... )
On the next four bead in say:
(Hail Mary....)
after the 4 Hail Marys say one (Glory be to the father...)

On the next single bead of group 2:
Blessed by the Holy and Immaculate Conception of the Blessed Virgin Mary.
(Our Father.... )
On the next four bead of group 3:
(Hail Mary....)
after the 4 Hail Marys say one (Glory be to the father...)

On the next single bead
Blessed by the Holy and Immaculate Conception of the Blessed Virgin Mary.
(Our Father.... )
On the next four bead say:
(Hail Mary....)
after the 4 Hail Marys say one (Glory be to the father...)

Information taken from:
Twenty-Four Rosaries and Chaplets Compiled by Patrick Shaughnessy, O.S.B., S.T.D.