There's Something About That Tillinghast Name ...

"Horrible beyond conception was the change which had taken place in my best friend, Crawford Tillinghast." From Beyond, HPL



(Also notice in fine print that the name "Eddy" is mentioned.)

Provenance: Ebay

This listing is for a typewritten letter from "The Tillinghast, Stiles Co., Commission Merchants. Cotton and Worsted Yarns. All Numbers and Colors", dated "Providence, R.I., April 1, 1920" To "Joseph P.Allen Co., Inc." of Pawtucket, R.I. about a shipment of yarn.

1920 Providence Catalog

This really has little to do with Lovecraft, other than being locted in Providence. However, if you do role playing in Lovecraft's contemporary era, it might give you a feel for the visuals of the time.