As Gigapie says, you need to get off the Web - or at least, use it to look at pre-Internet sources.
Google Books http://books.google.com is a good option. Limiting search to 19th century immediately finds this:
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He also has an interesting note on the "Jumping Frenchmen " in Maine, and the "Holy Roller* " in Vermont, the latter a class of revivalists who roll over and over on the ground when they " get religion."
- The Medical and Surgical Reporter - Volume 40 - Page 81
New Lights.-This is a name assumed by a small band of fanatics, who commenced a brief career in the town of Hardwick in the early part of 1837.
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The exercises consisted of the most ludicrous and foolish performances, such as frightful yellings, barking in imitation of dogs, foxes and cuckoos,jumping, swinging the arms and rolling on the floor. From this last circumstance they were sometimes called holy rollers.
- History of Vermont, Zadock Thompson, 1842, page 204 https://books.google.co.uk/books?id=dGiZUCjvYkIC&pg=RA1-PA204#v=onepage&q&f=false
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And then there's the full OED online, which you'll probably be able to access via any decent library.
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Holy Roller n. colloq. a member of a religious group characterized by frenzied excitement or trances.
1842 Southern Q. Rev. (New Orleans) I. 400 It is a new species of religion, which sprang up..contemporaneously with the enthusiasm of the ‘Holy Rollers’.
1893 C. G. Leland Mem. I. 300 When the Holy Spirit seized them..the Holy Rollers..rolled over and over on the floor.
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