A leaflet called the Tessera, containing the Prayers of the Legion and bearing a reproduction of the Legion Picture,is issued to every member, active and auxiliary.
In Latin, Tessera had the particular meaning of a tally or token which was divided among friends in order that they or their descendants might always recognise each other.
As a military expression, it signified the square tablet upon which the watchword was written and circulated through the Roman Legion.
The Legion of Mary applies the word Tessera to the leaflet containing its prayers and picture. Here, too, are contained the ideas of (a) universal circulation in the Legion; (b) the setting out of the true watchword of the Legion - its prayers; and (c) a token of unity and fraternity between all legionaries, wherever found.  These so aid intercommunication as to be quite indispensable.