Robert Edward Plum’s intended bride Elma Rascher was born on the fourth of January 1887.
When Elma was 27, her big sister posted an engagement announcement in three St Louis Missouri newspapers; the St Louis Globe Democrat and the St Louis Star and Times both on 18 June 1914, and the St Louis Post Dispatch which was published on 21 June 1914.

Although it isn’t an official marriage certificate, it was a nice genealogical find.