"When they are assigned to complex ideas, they are meant as knots according to the very proper image Mr. Locke gives of them, to tie each specific bundle of ideas together: and in these respects they are not only useful, but necessary."
Letters or Essays Addressed to Alexander Pope, Esq.
At least 5 entries in ESTC (1754, 1777, 1793).<br>
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See "Letters or Essays Addressed to Alexander Pope, Esq." in the third volume of David Mallet's <u>The Works of the Late Right Honorable Henry St. John, Lord Viscount Bolingbroke</u>, 5 vols. (London : [s.n.], Printed in the Year 1754). &lt;<a href="http://estc.bl.uk/N20935">Link to ESTC</a>&gt;&lt;<a href="http://estc.bl.uk/T147520">Link to ESTC</a>&gt;<br>
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Text from the third volume of <u>The Works of the Late Right Honorable Henry St. John, Lord Viscount Bolingbroke</u>, 5 vols. (Dublin: Printed by P. Byrne: 1793). &lt;<a href="http://books.google.com/books?id=FoArAAAAYAAJ">Link to Google Books</a>&gt;<br>
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Reading also in the 1967 reprint of <u>The Works of Lord Bolingbroke</u>, 4 vols. (London: Henry G. Bohn, 1844).