Had 120 acres,sold 80. access to 40 through the 80. new owner says no.Must pay. Using this access 30 years?

My uncle owned 120 acres but due to age and illness sold 80 acres to a neighbor. The 40 acres are accessed through the 80 acres and now the new land owner says we have no access unless we pay. The 80 acres my uncle had was inherited from his father and has been in the family for over 60 years so I dont know any of the easements that came with that property. Proberly just a handshake at that time. The 40 acres were purchased 30 years ago and that may be the same kind of deal. Is the new owner correct with what hes doing and if so what should we do. We have my uncles permission to hunt and fish his property but cant at this time.