1.  LDS.  Family Search: Internet Genealogy Service: Ancestral File.

2.  WorldConnect / Ancestry World Trees (online at RootsWeb.com/Ancestry.com), including a file with this note:

BIOGRAPHY: NEW ENGLAND FAMILIES GENEALOGICAL AND MEMORIAL, The Emery line, pp 2353-4: John Emery, was born 29 Sep 1598, the son of John Emery and Agnes (Northend), of Romsey, Jampshire, England.  He sailed from Southampton 3 Apr 1635 with his brother Anthony and their families, in the ship "James," landing at Boston 3 Jun 1635.  He moved to Newbury, where he was made freeman 2 Jun 1641.

3.  John Matthews.  1991.  Complete American Armoury and Blue Book, combining 1903, 1907 and 1911-13 Editions.  Clearfield/Genealogical Publ. Co., Baltimore, MD (Broderbund CD-368).  In Armorial Addenda, Part II, on p. 30, including illustration: 

EMERY. JOHN EMERY, of Romsey, Hampshire, England, to Newbury, Mass., 1635. Arms -- Argent, three bars nebuleé gules, in chief as many torteaux. Crest -- Out of a mural crown a demi-horse argent maned or, collared gules studded of the first.

Translation:  The shield is silver/white with three horizontal red bars with wavy edges; above the uppermost bar is a row of three disks (presumably red).  The crest is a crown made to look like the ramparts of a castle (constructed of stonework), emerging from which is the upper half of a silver/white horse with a gold/yellow mane and wearing a red collar studded with silver/white.

4.  William Armstrong Crozier, ed.  1904.  Crozier's General Armory: a Registry of American Families Entitled to Coat Armor.  Fox, Duffield, & Co., New York (1957, Southern Book Co., Baltimore, MD; Broderbund CD-368).  On p. 54:

EMERY.  Massachusetts. John Emery, Newbury, 1635. (Essex.) Argent, three bars neculée gules, in chief as many torteaux. CREST -- Out of a mural crown, a demi-horse argent, maned or, collared gules, studded of the first. MOTTO -- Fidelis et suavis.