Since there was no classification system at this time the only way to distinguish this edition would be to use the publication year (1887) and maybe the page numbers (no, because Internet sources are not consistent on how many page numbers of first edition)?
This is before ISBN, so it won't have one, UNLESS someone assigned a number "posthumously", which it looks like someone did:
ISBN (still searching for isbn number)
The Chicago Manual of Style citation 2024:
Robertson, Wyndham. Pocahontas: Alias Matoaka, and Her Descendants Through Her Marriage at Jamestown, Virginia, in April, 1614, with John Rolfe, Gentleman; Including the Names of Alfriend, Archer, Bentley, Bernard, Bland, Boling, Branch, Cabell, Catlett, Cary, Dandridge, Dixon, Douglas, Duval, Eldridge, Ellett, Ferguson, Field, Fleming, Gay, Gordon, Griffin, Grayson, Harrison, Hubard, Lewis, Logan, Markham, Meade, McRae, Murray, Page, Poythress, Randolph, Robertson, Skipwith, Stanard, Tazewel, Walke, West, Whittle, and Others. United States: J. W. Randolph & English, 1887.
MLA
Robertson, Wyndham, 1803-1888, and R. A. (Robert Alonzo) Brock. Pocahontas, Alias Matoaka: And Her Descendants Through Her Marriage At Jamestown, Virginia, In April, 1614, With John Rolfe, Gentleman; Including the Names of Alfriend, Archer, Bentley, Bernard, Bland, Bolling, Branch, Cabell, Catlett, Cary, Dandridge, Dixon, Douglas, Duval, Eldridge, Ellett, Ferguson, Field, Fleming, Gay, Gordon, Griffin, Grayson, Harrison, Hubard, Lewis, Logan, Markham, Meade, McRae, Murray, Page, Polythress, Randolph, Robertson, Skipwith, Stanard, Tazewell, Walke, West, Whittle, And Others. Richmond: J. W. Randolph & English, 1887.
APA
Robertson, W., Brock, R. A. (Robert Alonzo). (1887). Pocahontas, alias Matoaka: and her descendants through her marriage at Jamestown, Virginia, in April, 1614, with John Rolfe, gentleman; including the names of Alfriend, Archer, Bentley, Bernard, Bland, Bolling, Branch, Cabell, Catlett, Cary, Dandridge, Dixon, Douglas, Duval, Eldridge, Ellett, Ferguson, Field, Fleming, Gay, Gordon, Griffin, Grayson, Harrison, Hubard, Lewis, Logan, Markham, Meade, McRae, Murray, Page, Polythress, Randolph, Robertson, Skipwith, Stanard, Tazewell, Walke, West, Whittle, and others. Richmond: J. W. Randolph & English.
WorldCat OCLC Number / Unique Identifier: 1651163
Going forward. What about a newish book?