Crossword puzzle clue "line of hills"

Answer to the folk riddle "Over the hills, over the hills / Goes a fur coat"

Add vertical line 13 (word 3) and vertical line 3 (word 1) together and enter the answer to the resulting clue on this line

Add vertical line 9 (word 2) and vertical line 7 (word 2) and enter the answer to the resulting clue on this line

Add vertical line 1 (word 1) and vertical line 15 (word 3) and enter the answer to the resulting clue on this line

Add vertical line 15 (word 1) and vertical line 1 (word 3) and enter the answer to the resulting clue on this line

"I knew ___ Carroll, was over a barrel/When 'Tarantula' took to the hills." (line from "Science Fiction/Double Feature" in "Rocky Horror")

Hills on N. Y.–N. J. border line.

Line of hills