March 1886, "Eighteenth Thousand" 

A copy from the "Eighteenth Thousand" has 1886 on its title-page, and a date-code at the bottom page 320: "20.386"

The date-code signifies that this copy was printed March 1886. The ads are date-coded "5 G. 1.86" (January 1886)

Another copy from the "Eighteenth Thousand"

Another copy from the "Eighteenth Thousand" has 1886 on its title-page, and a date-code at the bottom page 320: "20.386"

The date-code signifies that this copy was printed March 1886. The ads are date-coded "5 G. 4.86" (April 1886)

April 1886, "Twentieth Thousand"

A copy from the "Twentieth Thousand" has 1886 on its title-page, and a date-code at the bottom page 320: "20.486"

The date-code signifies that this copy was printed April 1886.

May 1886, "Twenty-fifth Thousand"

A copy from the "Twenty-fifth Thousand" has 1886 on its title-page, and a date-code at the bottom page 320: "20.586"  Ads are date-coded "7.86"

The date-code signifies that this copy was printed May 1886.

August 1886, "Twenty-eighth Thousand"

A copy from the "Twenty-eighth Thousand" has 1886 on its title-page, and a date-code at the bottom page 320: "3.886"

The date-code signifies that this copy was printed August 1886.  The ads are date-coded "5 B. 7.86" (July 1886)

September 1886, "Thirty-first Thousand"

A copy from the "Thirty-first Thousand" has 1886 on its title-page, and a date-code at the bottom page 320: "30.986"

The date-code signifies that this copy was printed September 1886.

"Thirty-fourth Thousand"

A copy from the "Thirty-fourth Thousand" has 1886 on its title-page

December 1886, "Thirty-seventh Thousand"

A copy from the "Thirty-seventh Thousand" has 1887 on its title-page, and page 320 is date-coded "30.1286"

The date-code signifies that this copy was printed December 1886.

"Fortieth Thousand"

A copy from the "Fortieth Thousand" has 1887 on its title-page

The ads are date-coded "5 G. 2.87" and "5 B. 2.87" (February 1887)

March 1887, "Forty-third Thousand"

A copy from the "Forty-third Thousand" has 1887 on its title-page, and a date-code at the bottom of page 320: "30.387"

The date-code signifies that this copy was printed March 1887. The ads are date-coded "5 G. 2.87" (February 1887)

"Forty-eighth Thousand"

A copy from the "Forty-eighth Thousand" has 1887 on its title-page, and a date-code at the bottom of page 320: "30.1086"

The date-code signifies that this copy was printed October 1886. Yet, the ads are date-coded "5 G. 7.87" leading to the possibility that this copy is from July 1887.