Despite its large size , in form the building is identical to other longhouses , the small room at the north end was a later addition .
The 1908 excavation had not fully revealed the entrances , annexes , and ancillary buildings .
Despite its large size , in form the building is identical to other longhouses , the small room at the north end was a later addition , and the 1908 excavation had not fully revealed the entrances , annexes , and ancillary buildings .