Company Names, addresses, dates:
  Dr. A.R. Mott, across from Courthouse, Leesburg VA (1843-18??) ¹
  Mott & Metzger, across from Courthouse, Leesburg VA (18??-ca.1872) ^2,3
  Mott & Purcell, Leesburg VA (ca.1872-1906) ^2,3
  Purcell & Littlejohn , Leesburg VA (1906-1963) ⁴

Notes:
Dr. Armstead Randolph Mott (1822-1894)⁵ opened a pharmacy on King Street across from the Loudoun County Courthouse in 1843¹.
During the civil war, Mott was one of a group of Leesburg residents who were arrested and sent to the Old Capitol prison in Washington DC - he was later unconditionally released⁶. After the civil war, Mott got a presidential pardon to retreive his property, which had been confiscated during the war⁷.
At some point, Mott teamed up with someone named Metzger and the pharmacy became known as Mott & Metzger.

Nicholas Sidney Purcell (1845-1930)⁸ bought out Metzger after the civil war, and the pharmacy became known as 'Mott & Purcell'².
He graduated the University of Maryland school of Pharmacy in 1872, and the first mention I found of the firm "Mott & Purcell" was from a newspaper article in November 1872³, so I beleive 1872 was the year that "Mott & Purcell" teamed up.
All the embossed bottles below have his last name spelled 'Pursel', but most documents have it spelled 'Purcell', and the labeled bottle below also has it spelled 'Purcell'. The 1880 US Census had it spelled 'Persell', but the 1900, 1910, and 1920 Census had it spelled 'Purcell'. It's spelled 'Purcell' on his death certificate and on his grave stone.
Purcell kept the name "Mott & Purcell" even after Mott passed away. In 1900, Horace Littlejohn started working for Purcell, and in 1906 Littlejohn bought out the Mott family's interest in the pharmacy, and it became known as Purcell & Littlejohn ⁴.
Purcell retired in 1913⁹.


Bottles:

	This is a clear 5.0" bottle with a glass stopper embossed: horizontal: MOTT & PURSEL / PHARMACISTS / (M&P monogram) / LEESBURG / VA base: WT&CO / V
	The left bottle is 5.2" tall, the right one is 4.2" tall. They are both embossed: horizontal: MOTT & PURSEL / PHARMACISTS / (M&P monogram) / LEESBURG / VA base (right bottle): WT&CO / AH / USA
	This is a clear 3.5" bottle embossed: vertical: MOTT & PURSEL / PHARMACISTS / LEESBURG / VA base: WT&CO / A / USA
	This aqua 4.8" un-embossed bottle has a label that says: label: MOTT & PURCELL, Druggists / LEESBURG, VA. / ... base: (glass pontil scar) Mott & Pursel didn't team up until after the era when bottles had pontil scars on the base, but this looks legitimate (i.e. I don't think some bottle collector just stuck the label onto an old pontiled bottle). I wonder if Mott had this bottle lying around since the early years (1840s/50s) before he was teamed up with Pursel, and he just re-used it?

	This is a clear, 1.8" dose glass, embossed: oval slug plate: MOTT & PURSEL / DRUGGISTS / LEESBURG VA. back: (1 vertical & 3 horizontal lines) TABLE / DESSERT / TEA base: K
	I beleive his is the building that housed Mott & Purcell's drug store, at 5 N King Street, Leesburg VA4. This building is across from the Courthouse. The photo was taken in 2010.