The signature of Harriet L. Keeler
<bdi><a href="https://en.wikipedia.org/wiki/en:Harriet_Louise_Keeler" class="extiw" title="w:en:Harriet Louise Keeler"><span title="American teacher, botanist, and author (1846-1921)">Harriet L. Keeler</span></a>
</bdi>
1920
<a rel="nofollow" class="external free" href="https://www.biodiversitylibrary.org/page/3944008">https://www.biodiversitylibrary.org/page/3944008</a>