This is the last of a series of four multicaches that will each require a visit to some of the small settlements in Ano Meria, the beautiful northern part of Syros that is often overlooked by visitors to the island. Ano Meria, the soul of Syros, rises from the most dramatic and isolated of its beaches up to its highest peaks with breathtaking views of many of the Cycladic islands across the sea. The region is reached by car from the road north out of Ano Syros above Ermoupoli.
To find this cache, you will have to visit Mavri Rachi (Μαύρη Ράχη), Syriga (Σύριγγα), Sa Mihalis (Σα Μιχάλης), and Kambos (Κάμπος) which are close by each other on the road north from Ano Syros.
The given location is not where you'll find the cache, but marks the junction in Mavri Rachi for the road to Syriga. The road is narrow and steep and takes you up past the windmills. The view up here is spectacular. To the East and West you can see the wide sea dotted with islands, to the South you can see the whole of the valley between Syriga and Pyrgos, the highest point in Syros,...
...and to the north you can see the wildest and emptiest part of Ano Meria.
At the end of the road, you can park your car in the windy settlement of Syriga (N37 29.011 E24 54.770).
Look for the plaque shown in the picture below which will give you the numbers represented by A and B.
You can reach the village of Sa Mihalis by returning down to Mavri Rachi and taking the road north. The once-deserted Sa Mihalis has gradually been returning to life over recent decades, though the upper part of the village around the red-roofed church is still mostly uninhabited.
If you have come by car, there is a car park next to the chuch of St Benedict (N37 29.282 E24 55.231). You can wander along the "main street" of the village and find the numbers C, D, and E hidden in the photos below.
A short way further along the road from Sa Mihalis lies Kambos, the most northerly settlement on Syros (N37 29.676 E24 54.906). Kambos marks the start of the hiking trails to some of the best beaches in Ano Meria: Lia, Megas Lakos, Marmari, Grammata, and Gria Spilia. The signpost in the photo below will reveal the final number in this multicache, represenetd by F.
You will find the cache hidden at N37 29.(B-D)(E/A)(B+C) E24 54.(E/D)(F-C-E)(A/D). The cache you are looking for is yellow and small enough to fit inside a hen's egg.
W (a.k.a. DidianRay)
You can check your answers for this puzzle on GeoChecker.com.