Show SinlhAunlrl n Alllanre Chicago March ISA special to the Post from Washington says tirent significance attaches to the practically agreed upon alliance betoen Austria A fill Spain for the Protection of tho Spanish throne against International Attack Till nlllnoo has armed SIl gntll with the conscious pwor that he call with rarely to the throne enter upon and curry Into effect negotiation for the relinquishment of Cuba And In this fact Is I to be found the kcjiton upon which rests substantial hope of n P uful ending of the present troubles This alliance Is I In reality themost Important I Im-portant development which has taken place since the Cuban question assumed Iln acute form |