<bdi><a href="https://en.wikipedia.org/wiki/en:Ludwig_Knaus" class="extiw" title="w:en:Ludwig Knaus"><span title="German artist (1829–1910)">Ludwig Knaus</span></a>
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<a rel="nofollow" class="external text" href="https://fineart.ha.com/itm/fine-art-painting/ludwig-knaus-german-1845-1933-a-sweet-lady-oil-on-panel-12-1-4-x-9-1-2-inches-311-x-241-cm-unsigned/a/656-23149.s">Heritage Auctions, Dallas,  06 December 2007  lot 23149</a>