Ancient MISC@1 such as PERSON@1 -LRB- LOCATION@1 NUMBER@1 -RRB- thought that the river near LOCATION@2 was part of the LOCATION@3 , a belief also held by PERSON@2 , while early MISC@2 explorers thought that it flowed west and joined the LOCATION@4 .

Ancient MISC@1 thought that the river near LOCATION@2 was part of the LOCATION@3 and PERSON@2 had the same opinion .
