Company Names, addresses, dates:
Herndon
  William I. Robey & Son, Pine Street, Herndon VA (c.1888-1900) ¹
  Ernest L. Robey, Pine Street, Herndon VA (c.1900-1917) ^1,2
Fairfax
  Ernest L. Robey, Main Street, Fairfax VA (c.1904-1927) ^1,3
Washington DC
  Ernest/Frank Robey, N. Capitol & H Streets NW, Washington D.C. (1911-1922) ^4,5
  Robey's Drugstore, 200 Upshur St. NW, Washington D.C. (1922-c.1927 ⁵
  Frank Robey, 5017 Connecticut Ave. NW, Washington D.C. (c.1927-1930) ⁵
  Frank Robey, Shoreham Hotel, Washington D.C. (1931) ⁵

Notes:
Ernest Lee Robey (1869-1938)⁶ had drugstores in Herndon, Fairfax City, and (with his brother Frank) Washington DC.
When he was in his teens, he worked in the Falls Church drug store of M.E. Church. He later worked for a pharmacy in Washington D.C. before coming back to Herndon where he started a drugstore. Besides his drugstore business, he was the president of the National Bank of Herndon, served as the town mayor, and became an Insurance agent.⁷

        Herndon Drug Store
Ernest started a drugstore in Herndon with his father, William Isaac Robey (1832-1906)⁸, about 1888. His father left the store in Ernest's hands in November 1900.¹ In 1917, there was a large fire in Herndon that burned down (or at least damaged) the store. ² The new store was housed in the building that is now the Zeffireli restaurant. ⁹

        Fairfax Drug Store
Ernest opened a second drugstore, this one in Fairfax, about 1902. Dr. Harry L. Burrows managed the Fairfax store. Harry died on June 10, 1927. In September of that year, Robey sold the Fairfax store to T. Ramsay Taylor of Norfolk VA although it appears that the building remained in the ownership of one of Ernest's brothers, attorney George B. Robey. ¹⁰

        Washington DC Drug Store(s)
Ernest opened a third store, this one in Washington DC, in March of 1911. At some point, this third store was taken over by Frank Robey, Ernest's brother. In 1922, the store became a People's drug store, and Frank opened up a new drugstore at 200 Upshur Street, NW. ⁵

        Other related info
Ernest's brother, Dr. William I Robey Jr, had a drugstore in Cape Charles VA, and eventually came back to Fairfax County, so he may have helped out Ernest at some point.

Bottles:

	This is a clear 6.3" (6 oz) bottle embossed: horizontal at the top: 3 vi vertical: Ernest L. Robey / DRUGGIST / HERNDON, VA. - FAIRFAX, VA. base: W.T. CO. / ? / U.S.A.
	The bottle above comes in at least 3 other sizes: 5.5" 4oz, 4.5" 2oz, and 3.7" 1oz, as pictured here. They are all embossed the same, other than the size (3iv, 3ii and 3i) and the middle letter on the base ("U", "R" & "I"). horizontal at the top: 3 iv (or "3 ii" or "3 i") vertical: Ernest L. Robey / DRUGGIST / HERNDON, VA. - FAIRFAX, VA. base: W.T. CO. / U / U.S.A.
	This is a 5.25" tall, unembased clear mouth-blown bottle with a label that says: label: ESS. PEPPERMINT / ALCOHOL 85 PER CENT / DOSE: Adults, one half to one teaspoonful. Children in proportion to their age. / ERNEST L. ROBEY'S DRUG STORE / HERNDON, VA. FAIRFAX, VA.

	This photo (taken May 2010) is of the Zeffireli restaurant on the corner of Station & Pine Streets. It is the building that housed Robey's Herndon drugstore (after the original building burned down).2
	This postcard shows the Chamblin's drug store on Station Street in Herndon. Ralph Von Sickler Chamblin bought Robey's Herndon drug store just after the US entered WW I5. So this might have also been a building that housed Robey's drug store.

	This postcard (postmarked 1908) depicts Robey's drug store in Fairfax VA. On the bottom edge is printed: "DRUG STORE AND HALL, FAIRFAX VA". Based on the position of the sign above the left door in the picture, it appears the drug store occupied the left side of the building, so the "hall" probably occupied the right side. The drugstore has minor differences from the photo in the postcard below, which was postmarked 5 years later.
	This postcard (postmarked 1913) also depicts Robey's drug store in Fairfax VA. Compare it to the photo below, which seems to be same building, but without the chimneys.
	This photo (taken May 2010) is of the Bellissimo restaurant. It appears to be the building that housed Robey's Fairfax drugstore, based on comparing it to a photo in the postcard above.