Identifying A 1901 S Barber Quarter

Ten yrs. ago I found an old silver coin in the dirt under a set of basement stairs in an old house,I never gave it much thought since it was so worn until about six months ago I ran across it and looked it up on the internet the date was clearly 1901 but I could not make a mint mark out because of the wear,this was the only thing I found under those stairs and it just seems strange it was that year of coin,I have visited several sites regarding authentication,both ones are centered over a denticle and the second one is very close to the vest whereas the first is somewhat further away,could I possibally been this lucky and how can I know for sure