noon
`` Man , we trailed that line for hours ! After a while , I noticed another queer thing : they were getting larger . Same number of bricks in each one , but the bricks were larger . `` By noon they were shoulder high . I looked into a couple -- all just the same , broken at the top and empty . I examined a brick or two as well ; they were silica , and old as creation itself ! '' `` How you know ? ''