Baltimore Horse Show, unidentified men and women sitting outside, undated [circa 1900-1910].

Baltimore Horse Show, unidentified men and women sitting outside, undated [circa 1900-1910].

Baltimore Horse Show, unidentified men and women sitting outside, undated [circa 1900-1910].

Baltimore Horse Show, unidentified men and women sitting outside, undated [circa 1900-1910].

Baltimore Horse Show, unidentified men and women sitting outside, undated [circa 1900-1910].

Baltimore Horse Show, unidentified men and women sitting outside, undated [circa 1900-1910].

Baltimore Horse Show, unidentified men and women sitting in automobile, undated [circa 1900-1910].

Baltimore Horse Show, unidentified men and women sitting in automobile, undated [circa 1900-1910].

Baltimore Horse Show, grounds and crowd, undated [circa 1900-1910].

Baltimore Horse Show, grounds and crowd, undated [circa 1900-1910].

Baltimore Horse Show, crowd, undated [circa 1900-1910].

Baltimore Horse Show, crowd, undated [circa 1900-1910].

Baltimore Horse Show, crowd, undated [circa 1900-1910].

B.W. Livingston, undated [circa 1900-1910].

B.W. Livingston, undated [circa 1900-1910].

B.W. Livingston, undated [circa 1900-1910].

B.W. Livingston, undated [circa 1900-1910].

B.W. Livingston, undated [circa 1900-1910].

B.B. Mixell, undated [circa 1900-1910].

Angie, May Voorhees, Flash (dog) and 'I' (unidentified photographer) in a surrey, Hempstead N.Y., June 9, 1891. Taken by the photographer's mother.

Allen D. Woods, undated [circa 1900-1910].

Allen D. Woods, undated [circa 1900-1910].

Allen D. Woods, undated [circa 1900-1910].

Alex Cameron, undated [circa 1900-1910].