Thomas Wilson 
Swastika [PDF ebook] 
The Earliest Known Symbol, and Its Migrations; With Observations on the Migration of Certain Industries in Prehistoric Times

Whilst the greatest effort has been made to ensure the quality of this text, due to the historical nature of this content, in some rare cases there may be minor issues with legibility. Assumptions may appear as to antiquity, origin, and migration of the Swastika, but it is explained that many times these only reflect the Opinion of’the writers who are quoted, or are put forth as working hypotheses.