I tried to put myself in Marjory's position. If her hands were useless, as they would be if she could not use them without suspicion--even were they not tied now as was probable--her next effort would be with her feet; I therefore looked out carefully for any sign made this way. Presently I came across a mark which I suspected. It was only a few steps beyond the last mark on the wall. It was a sort of drag of the foot, where there was any slight accumulation of dust, or rubbish, or sand. There were more such traces ahead. So motioning to the others to keep back, I followed them up, taking care not to disturb any of them. They were but the rough marks made during a stumbling progress; and for a time I was baffled; though I could distinguish the traces of Marjory's little feet amongst the great ones. Then I went back and looked at them afresh from the beginning, and a light burst upon me. They were made with the right or left foot as required; thus she could reproduce the bi-literal symbol. Interpretation was now easy enough, and hence on, to the exit from the tunnel, I could tell almost every word written. There being only a few cases where the sign was not sufficiently marked for me to read it. "Suspicious. Hands tied--gagged--find Seagull--find Manse." It was sadly slow work, and my heart at times sank within me at the exasperating delay in our progress. However, it was progress after all; and that sustained us. All along, as we worked our way towards the monument, I had been thinking of the word "manse;" and now its repetition showed its importance. It would be necessary that the abductors have some place in which to conceal their captive, before they should be able to get her out of the country. That this latter would be a necessary step towards their object was manifest; but the word _Seagull_ settled it. When we got to the entrance of the tunnel we examined every inch of the way; this was the wish of the detective rather than my own. Marjory would, it seemed to me, go quietly through the entrance. She would know that she was being watched here with extra carefulness; and would reserve herself for a less suspicious opportunity. She would also know that if I were on her track at all, I would be able to follow through the secret entrance.