Big hint!
When you look at the book lists for your secondary sources, look at the results for collections of letters, essays, diaries, and other materials that can be used as primary sources.
You can also change the publication date function to find primary sources on your topic through the main catalog.
Wallpaper OR "wall paper" 1700-1799 in hathi, googlebook , PRIMO , ProQuest , GALE 1 2, Chronicling america,
"wallpaper" OR "wall paper" in key databases
try "paper hangings" in Virginia gazette, Chronicling america, GALE, ProQuest , Primo , googlebook , hathi
May also be called Tapestry papers or dominotés papers French sources seem to use the phrase Papiers dominotés (ex) googlebook and hathi
try adding London AND import* AND "paper hangings" ex gale ex doc