It was the Edinboro Building on the 1938 Bromley Atlas. I found this write up in this BRA document
https://archive.org/stream/onelincolnstreet00king/onelincolnstreet00king_djvu.txt
"85-91 ESSEX, THE EDINBORO BUILDING, GEO. POPE, 1890
The Edinboro Building is a dignified 6xl0-bay brick and...