The site is devoted to promoting the corrected pedigrees of the early imported Thoroughbred mares as well as providing hypotheses for some mares whose parentage is unknown.  In North America the first volumes of the stud book, as with all early stud books, were compiled with errors or incomplete pedigrees.  Since no early volumes were reprinted with corrections, the errors continue to be repeated.

Bloodline enthusiasts are familiar with the family number designations Bruce Lowe assigned to families originating in Great Britain and recorded in the General Stud Book.  Bobinski assigned families originating in North America numbers as well.  In addition to the numbered North American families is a list I've made of the remaining families not included by Bobinski.  The families require recognition for the purpose of tracing family lineages.
 
 

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