If you're interested in who the addressee was on the previously posted cover (David G. Evans & Co.) it was a coffee company in St. Louis.
The firm of David G. Evans & Co. was founded in 1856 by David G. Evans under the style of Flint, Evans & Co., changed in 1870 to David G. Evans & Co. David G. Evans died in 1916, and the name of the company was changed in 1917, to the David G. Evans Coffee Co., with Gwynne Evans, a son of David G., as president of the corporation.
Based on the above quote the use of the name "David G. Evans & Co." was between 1870 to 1916 and since the embossed envelope wasn't issued until 1893, the date of the example shown would be from 1893 to 1916.
Here's a picture of Mr. David G. Evans:
Also, a photo of their coffee jar from the period: