The Crosslet Cross is a heraldic cross made of four Latin Crosses arranged at right-angles to each other (or one Greek Cross with small crosses at the end of each arm), with the top of each small cross pointing to different direction (north, south, east and west).
A common interpretation is that this represents the four evangelists: Matthew, Mark, Luke and John.
Like the Jerusalem Cross, it is also considered as a symbol for world evangelism (though the Jerusalem Cross is not a Crosslet), which gives it an alternative name: the Mission Cross.
It is also known as Crossed Cross, and can be found on other different Missionary Crosses such as St Julian’s Cross.
89-91; Pastoureau, 13-67. Neubecker, 106-107
www.crosscrucifix.com