- ^ a b c d One or more of the preceding sentences incorporates text from a publication now in the public domain: Chisholm, Hugh, ed. (1911). "Smith, James and Horace". Encyclopædia Britannica. Vol. 25 (11th ed.). Cambridge University Press. p. 264.
- ^ a b Robertson, Fiona. "Smith, Horatio". Oxford Dictionary of National Biography (online ed.). Oxford University Press. doi:10.1093/ref:odnb/25815. (Subscription or UK public library membership required.)
- ^ Edward Cave; John Nichols (1832). The Gentleman's Magazine, and Historical Chronicle. Edw. Cave. p. 574.
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