"On the Authority of Lord Coleridge" [John Duke Coleridge, first Baron Coleridge (1820–1894)]; reported in Hoyt's New Cyclopedia Of Practical Quotations (1922), p. 493. The same quotation is given on the same authority in the ninth edition of Bartlett's Familiar Quotations (1905), essentially a reprint of the 1891 edition.
P. G. Wodehouse made use of the same quotation in a short story, "The Man Upstairs," which was published nearly simultaneously in March 1910 in the Cosmopolitan magazine for the American market and for the Strand magazine for the English market. Interestingly, while the American short story uses the "Almighty God" version of the quotation, it appears in a slightly variant form in the English publication: " ' "My learned friend’s manner would be intolerable in an emperor to a black-beetle," ' quoted Beverley." It is probably that Wodehouse (or more likely his editors) altered the quotation to avoid the very strict blasphemy laws that formerly obtained in the United Kingdom, changing the quotation to refer merely to a highly ranked human.
Attributed
“The limbs of all the vertebrate animals are, in like manner, on one plan, however various they may appear.”
Source: Vestiges of the Natural History of Creation (1844), p. 195
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Robert Chambers (publisher, born 1802) 100
Scottish publisher and writer 1802–1871Related quotes

Spence's Anecdotes and The Guardian (21 May 1713); as quoted in The Ethics of Diet: A Catena of Authorities Deprecatory of the Practice of Flesh-eating https://archive.org/stream/ethicsofdietcate00will/ethicsofdietcate00will#page/n3/mode/2up by Howard Williams (London: F. Pitman, 1883), p. 132.

Solidarity in Liberty: The Workers' Path to Freedom (1867)
Context: What all other men are is of the greatest importance to me. However independent I may imagine myself to be, however far removed I may appear from mundane considerations by my social status, I am enslaved to the misery of the meanest member of society. The outcast is my daily menace. Whether I am Pope, Czar, Emperor, or even Prime Minister, I am always the creature of their circumstance, the conscious product of their ignorance, want and clamoring. They are in slavery, and I, the superior one, am enslaved in consequence.

Source: Vestiges of the Natural History of Creation (1844), p. 192
Context: While the external forms of all these various animals are so different, it is very remarkable that the whole are, after all, variations of a fundamental plan, which can be traced as a basis throughout the whole, the variations being merely modifications of that plan to suit the particular conditions in which each particular animal has been designed to live. Starting from the primeval germ, which, as we have seen, is the representative of a particular order of full-grown animals, we find all others to be merely advances from that type, with the extension of endowments and modification of forms which are required in each particular case; each form, also, retaining a strong affinity to that which precedes it, and tending to impress its own features on that which succeeds.

“Fate, however, is to all appearance more unavoidable than unexpected.”
Parallel Lives, Caesar
“These principles, like the notes of a piano, may be used in many various combinations.”
Source: 1910s, Ads and Sales (1911), p. 8-9