(1) T.H. Breen, James H. Lewis, and Keith Schlesinger, “Motive for Murder: A Servant’s Life in Virginia, 1678,†The William and Mary Quarterly, 3rd Ser., Vol. 40, No. 1 (Jan 1983): 106-120.
(2) The Vain Prodigal Life, and Tragical Penitent Death of Thomas Hellier Born at Whitchurch near Lyme in DORSET-SHIRE: Who for Murdering his Master, Mistress, and a Maid, was Executed according to Law at Westover in Charles City, in the Country of Virginia, neer the Plantation called Hard Labour, where he perpetrated the said Murders. He Suffer'd on Munday the 5th of August, 1678. And was after Hanged up in Chains at Windmill-Point on James River (London, 1680). [This pamphlet is reproduced in full in Breen's article.]
(3) W.P.W. Phillimore and Edmund Nevill, Dorset Parish Registers. Marriages (London: n.p., 1910), V:82.
(4) A. M. Broadley, "Thomas Hellier of Whitchurch Canonicorum," Somerset & Dorset Notes and Queries, Vol. 13, p. 108, available online at British Origins.