This is the accepted manuscript made available via CHORUS. The article has been published as: Two-Stage Ordering of Spins in Dipolar Spin Ice on the Kagome Lattice Gia-Wei Chern, Paula Mellado, and O. Tchernyshyov Phys. Rev. Lett. 106, 207202 — Published 20 May 2011 DOI: 10.1103/PhysRevLett.106.207202