To find Clue 4, which links Clue 2 to Clue 5, solve the puzzle of the Artist's Journal which is currently in the hands of either Doctor No or one of his henchmen.
There is nothing at the listed coordinates.
Links to other caches in the series:
¤ Jacob's Pillow
¤ BD Eye
¤ Charles Edghill
¤ Eric Coverly
¤ Henry Lopez
¤ Adrian Robinson
¤ Doctor No
¤ Clue 1
¤ Clue 2 (Pink Ribbon)
¤ Clue 3 (Queen's Portraits)
¤ Clue 4 (Artist's Journal)
¤ Clue 5 (Artist's Palette)
¤ Bonus - Lucifer's Musical Box
¤ Bonus - Major Ursa's Gadget Stash
Part of The Final Revelation series of 66 puzzle caches.