The Collaborative International Dictionary of English v.0.48:

Stallage \Stall"age\ (st[add]l"[asl]j; 48), n. [Cf. OF.
   estallage, of German origin. See Stall, n.]
   1. (Eng. Law) The right of erecting a stall or stalls in
      fairs; rent paid for a stall.
      [1913 Webster]

   2. Dung of cattle or horses, mixed with straw. [Obs.]
      [1913 Webster]