One of the most important figures in the history of British engraving, he died in London, unmarried, in 1887 and was buried in a family grave (no.12697) on the western side of Highgate Cemetery.
In the finest of his numerous transcripts of Lawrence, such as Lady Acland and her Sons, Pope Pius VII and Master Lambton, the distinguishing characteristics of the engravers work, brilliancy and force of effect in a high key, corresponded exactly with similar qualities in the painter.
To this mixed style, previously used by Richard Earlom on copper, Cousins added heavy roulette and rocking-tool textures, tending to fortify the darks, when he found that the burr even on steel failed to yield enough fine impressions to meet high demand.
The effect of his prints in this method after Reynolds and Millais was mechanical and out of harmony with the picturesque technique of these painters, but the phenomenal popularity which Cousins gained for his works at least kept alive and in favor a form of mezzotint engraving during a critical phase of its history.
Abraham Raimbach, the line engraver, dated the decline of his own art in England from the appearance in 1837 of Cousins's print (in the mixed style) after Landseer's Bolton Abbey.