coles's research showed that the use of the island was stable over a long period, but not whether occupation there was year-round or seasonal. kent lightfoot of uc berkeley is reanalyzing coles's material to determine whether seasonal patterns can be identified. the latest carbon-14 date from the shellmound material is about 300 years ago, but it is possible that the island was used until the era of european contact. the richmond museum of history acquired coles's collection of brooks island artifacts following his death in 2015.