Half past ten
She knew nothing of engineering , of course , but she had an abundance of practical common sense , and in most of the affairs of this life , common sense goes a long way as a substitute for skill . `` What time is it now ? '' she asked , after she had watched the slow progress of the work long enough to estimate the prospect . `` Half past ten . '' `` Then we 've only an hour and a half more . It is n't enough . You can never fill that hole in time . ''