dedimus potestatem de attorno faciencd

from Bouvier's Law Dictionary, Revised 6th Ed (1856)
DEDIMUS POTESTATEM DE ATTORNO FACIENCDO. The name of a writ which was 
formerly issued by authority of the crown in England to authorize an 
attorney to appear for a defendant. 
     2. By statute of Westminster 2, 13 Edw. I. c. 10, all persons impleaded 
may make an attorney to sue for them in all pleas moved by or against them, 
in the superior courts there enumerated. 3 Mann. & Gran. 184, note. 
    

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