The Collaborative International Dictionary of English v.0.48:

Harp \Harp\ (h[aum]rp), n. [OE. harpe, AS. hearpe; akin to D.
   harp, G. harfe, OHG. harpha, Dan. harpe, Icel. & Sw. harpa.]
   1. A musical instrument consisting of a triangular frame
      furnished with strings and sometimes with pedals, held
      upright, and played with the fingers.
      [1913 Webster]

   2. (Astron.) A constellation; Lyra, or the Lyre.
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   3. A grain sieve. [Scot.]
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   Aeolian harp. See under Aeolian.
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   Harp seal (Zool.), an arctic seal (Phoca Gr[oe]nlandica).
      The adult males have a light-colored body, with a
      harp-shaped mark of black on each side, and the face and
      throat black. Called also saddler, and saddleback. The
      immature ones are called bluesides; their fur is white,
      and they are killed and skinned to harvest the fur.

   Harp shell (Zool.), a beautiful marine gastropod shell of
      the genus Harpa, of several species, found in tropical
      seas. See Harpa.
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The Collaborative International Dictionary of English v.0.48:

Saddler \Sad"dler\, n.
   One who makes saddles.
   [1913 Webster]

   2. (Zool.) A harp seal.
      [1913 Webster]

WordNet (r) 3.0 (2006):

saddler
    n 1: a maker and repairer and seller of equipment for horses

Moby Thesaurus II by Grady Ward, 1.0:

70 Moby Thesaurus words for "saddler":
   baker, bidet, bookdealer, bookseller, butcher, carriage horse,
   cart horse, cavalry horse, chandler, clothing merchant,
   confectioner, draft horse, draper, dray horse, driving horse,
   drysalter, fill horse, filler, fishmonger, fishwife, florist,
   footwear merchant, fruiterer, furnisher, furrier, gigster,
   greengrocer, grocer, groceryman, haberdasher, hack, hackney,
   hardwareman, hunter, ironmonger, jeweler, jument, lead, leader,
   liquor merchant, mount, newsdealer, pack horse, palfrey, perfumer,
   plow horse, pole horse, polo pony, post-horse, poulterer, remount,
   rider, riding horse, road horse, roadster, rouncy, saddle horse,
   shaft horse, stalking-horse, stationer, sumpter, sumpter horse,
   thill horse, thiller, tobacconist, vintner, wheeler, wheelhorse,
   wine merchant, workhorse