Thomas Bassett Macaulay
... that most of the world's pure bred Holstein cattle descend from the herd of 20th century Canadian actuary Thomas Bassett Macaulay?
... that most of the world's <a class="mw-redirect" href="./True_breeding_organism" id="mwBkc" rel="mw:WikiLink" title="True breeding organism">pure bred</a> <a class="mw-redirect" href="./Holstein_cattle" id="mwBkg" rel="mw:WikiLink" title="Holstein cattle">Holstein cattle</a> descend from the herd of 20th century Canadian <a href="./Actuary" id="mwBkk" rel="mw:WikiLink" title="Actuary">actuary</a> <b id="mwBko"><a href="./Thomas_Bassett_Macaulay" id="mwBks" rel="mw:WikiLink" title="Thomas Bassett Macaulay">Thomas Bassett Macaulay</a></b>?