Born on May 6, 1843 in Scotland and died on July 2, 1906 in Des Moines, Iowa, USA.
Lots more info if you have an Ancestry subscription: http://person.ancestry.co.uk/tree/16187304/person/348090114/facts
A short biography in German in the magazine Zeit & Schrift; online available on https://www.zs-online.de/site/assets/files/4475/zs_2018-2_06.pdf