<bdi><a href="https://en.wikipedia.org/wiki/en:Karol_D._Witkowski" class="extiw" title="w:en:Karol D. Witkowski"><span title="Polish-American artist">Karl Witkowski</span></a>
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<a rel="nofollow" class="external text" href="http://auctions.freemansauction.com/auction-lot-detail/KARL-WITKOWSKI%2C-%28AMERICAN-1860-1910%29%2C-SHOE-SHINE-BOY-WITH-CH/1507++++++28+/++918372">Freeman’s, Philadelphia, 7 Dec 2014, lot 28</a>