Aw nuts! I'll just post links to the uncompressed tiffs and include the corresponding data here. I don't know why I was having trouble linking the actual pages, but the Civil War section of the Prints & Photographs Online site has been sketchy lately.
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TITLE: [Centreville, Va. Fort on the heights, with Quaker guns]
CALL NUMBER: LC-B811- 334[P&P]
LOT 4166-K (corresponding print). Check for an online group record (may link to related items)
REPRODUCTION NUMBER: LC-DIG-cwpb-00979 (digital file from original neg. of left half)
LC-DIG-cwpb-00980 (digital file from original neg. of right half)
LC-B8171-0334 (b&w film copy neg.)
RIGHTS INFORMATION: No known restrictions on publication.
SUMMARY: Photograph from the main eastern theater of war, Confederate winter quarters, 1861-1862.
MEDIUM: 1 negative (2 plates) : glass, stereograph, wet collodion.
CREATED/PUBLISHED: 1862 March.
CREATOR: Barnard, George N., 1819-1902, photographer.
RELATED NAMES: Gibson, James F., b. 1828, photographer.
http://memory.loc.gov/master/pnp/cwpb/00900/00979u.tif--------------------------------------------------------------------------------------------------------
TITLE: Centreville, Virginia. Confederate fort on the heights with Quaker guns
CALL NUMBER: LC-B811- 1144[P&P]
REPRODUCTION NUMBER: LC-DIG-cwpb-01352 (digital file from original neg.)
RIGHTS INFORMATION: No known restrictions on publication.
MEDIUM: 1 negative : glass, wet collodion.
CREATED/PUBLISHED: 1862 Mar.
CREATOR: Barnard & Gibson, photographer.
http://memory.loc.gov/master/pnp/cwpb/01300/01352u.tif--------------------------------------------------------------------------------------------------------
TITLE: Group of Federal soldiers in Confederate fort on heights of Centreville with Quaker guns
CALL NUMBER: LC-B811- 334A[P&P] LOT 4166-K (corresponding print). Check for an online group record (may link to related items)
REPRODUCTION NUMBER: LC-DIG-cwpb-00981 (digital file from original neg. of left half)
LC-DIG-cwpb-00982 (digital file from original neg. of right half)
RIGHTS INFORMATION: No known restrictions on publication.
SUMMARY: Photograph from the main eastern theater of war, Confederate winter quarters, 1861-1862.
MEDIUM: 1 negative (2 plates) : glass, stereograph, wet collodion.
CREATED/PUBLISHED: 1862 March.
CREATOR: Barnard, George N., 1819-1902, photographer.
RELATED NAMES: Gibson, James F., b. 1828, photographer.
http://memory.loc.gov/master/pnp/cwpb/00900/00981u.tif--------------------------------------------------------------------------------------------------------
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Brian WhiteWambaugh, White, & Companyhttp://www.wwandcompany.com----------------------------------
Randolph Mess, U.S. Sharpshooters