Find A Grave list a Roberts Cemetery in St. Helena Parish. Their map indicates that it is located on Hwy 441 between Hwy 1046 and Hwy 1048(not 1047).
The Louisiana Tombstone Transcription Project- St. Helena Parish list a Robertson Cemetery "Highway 441, south from Highway 10"
The same graves appear on both list, so presumably they are the same cemetery.
BUT the satellite map shows no cemetery on HWY 441 between Hwy 16 and Hwy 10. One can clearly see the Killian Cemetery where Hwy 441 meets Hwy 16, but nothing north of that.
Can anyone help me locate this cemetery?