Just out of curiosity and to get a better feeling for what the island is like, have TIGHAR ever found anything recognizably Arundel? Or any buildings outsinde the village, e.g. on the settlers' plots (where the settlers are described as having "weekend houses")? From what I've read, e.g. about the condition you found the village in 25 years after the last settlers had left, it seems to me that anything left around deteriorates or gets grown over very, very quickly, so I wonder if buildings etc. from the Arundel's time would still have been recognizable as "signs of recent habitation" after almost 40 years? (Maybe the 1938 photographs will show).
Also, while huts are "signs of habitation", why would anyone trying to describe what he saw many years later call them "markers of some kind"?