nine o'clock
It is among the mountains , on the borders of Andorra . You take the train from Barcelona to Berga , the diligencia from Berga to Organa . Between Organa and La Seo de Urgel is a bridge called La Puente del Diabolo . I will meet you at this bridge on foot on Thursday morning at nine o'clock . We can walk up into the mountains together . I shall bring a small travelling clock with me . We shall stand it on the ground between us , and when it strikes , we fire . ' ''