Company Names, addresses, dates:^1,2
  Charles G. Lennon, 604 King Street, Alexandria VA (1887-1896)
  Charles G. Lennon, 616 King Street, Alexandria VA (1896-1904)
  Claude M. Lennon, 604 King Street, Alexandria VA (1896-1905)
  Lennon & Duncan, 604 King Street, Alexandria VA (1906-1908)

Notes:
Charles Green Lennon (1863-1945)³ was a druggist in Alexandria VA.¹
The 1880 US Census lists him as a drug clerk, at age 17. The 1887 city directory for Alexandria lists him as a drug clerk working for J.D.H. Lunt.

In 1888, he purchased A.A. Warfield's drug store at 604 King Street². Lennon ran that drug store for a while and later opened a store a few doors down at 616 King Street. He continued in the Alexandria drug store business until 1908, when he moved to the Brookland neighborhood of Washington DC and opened a drug store there⁴.
In 1909, he sold his drug store at 616 King Street to William P. Taylor⁵.

Charles' younger brother Claude M. Lennon (1871-1941)⁶ was also a druggist, and ran a drug store. It appears from the city directories that Claude took over the store at 604 King Street while Charles opened the other store at 616 King Street. Eventually Claude took on a partner and his store was called "Lennon & Duncan". That store continued until 1908, when Claude Lennon declared bankruptcy⁷.


Bottles:

	book # (unlisted) (in medicines section) This is a clear 3.5" bottle embossed: vertical:CHARLES G. LENNON / PHARMACIST / ALEXANDRIA, VA.
	book # (unlisted) (in medicines section) This is a clear 6.2" bottle embossed: vertical:CHARLES G. LENNON Ph.G. / ALEXANDRIA, / VA. base: 2 / PAT JUN 25 89 / C L G Co Wikipedia says that "Ph.G." is an obsolete abbreviation for "Graduate of Pharmacy".