four o'clock before
He became so absorbed that he was quite unaware of the passage of time and it was with something of a surprise that he heard the announcement of lunch . This was due to Early Bird , who , seeing that it was after noon , had unpacked the hamper and set out a good meal . Both artists dined heartily and Early Bird was not forgotten when the artists returned to their drawings . But although Colin worked as hard as he could , it was four o'clock before he felt that he had finished . The museum expert was also still at work when the sun began to fail to give a sufficiently direct light to pierce the water . Colin was eager to see his companion 's sketch , but this was denied him . `` No , '' he was told .