Pre-1865 judgments were published in 'nominate reports'. Many of these have been reprinted in a series called the English Reports.
This guidance applies whether you found the law report in print or online.
case name | (year) | volume | nominate report abbreviation | first page, | volume | English Report abbreviation | first page
Footnote (if you HAVE given the case name in the text of your work):
e.g. (1857) 2 H&N 564, 157 ER 232
Footnote (if you HAVE NOT given the case name in the text of your work):
e.g. Boulton v Jones (1857) 2 H&N 564, 157 ER 232
Bibliography:
e.g. Boulton v Jones (1857) 2 H&N 564, 157 ER 232
To pinpoint, follow the citation with a comma and the page number from the English Reports. To pinpoint several pages, insert a dash between the page numbers:
e.g. Boulton v Jones (1857) 2 H&N 564, 157 ER 232, 233-235