Here's info on BDPi from College Fraternity Heraldy (Butterfield, 1931):
Sable, on a sinister blend six plates ermine.
Motto: Inter se fideles
This group uses a closed helmet in profile of silver. The design of the coat of arms was taken from the pin and hence the shield shows a notch in the dexter chief. The design was adopted at the 1917 convention.
page 40
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Delta Delta Delta
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