However , all its passageways `` had become blocked by a solidified mass of rubble , small stones and rubbish which had been carried into the tomb by floodwaters '' and it was not until the 1903-1904 excavation season that Howard Carter , after 2 previous seasons of strenuous work , was able to clear its corridors and enter its double burial chamber .
In 1903-1904 Howard Carter , after two years of hard work , was able to clear the passages and enter the double burial chamber .