A detailed etching and engraving by Samuel Ireland, depicting the English painter Sir James Thornhill after an original work by William Hogarth.

This portrait print depicts Sir James Thornhill, the notable English painter of the early eighteenth century, known for his work on the dome of St Paul's Cathedral and the Painted Hall at Greenwich. The print is an etching and engraving by Samuel Ireland, a British author, engraver, and collector who produced a series of prints based on the works of William Hogarth. The inscription at the base of the image notes 'Wm. Hogarth pinx.', indicating that Ireland based this composition on an original painting by Hogarth.

The subject is presented in a bust-length format, wearing the voluminous periwig characteristic of the period. The engraving technique employs fine cross-hatching to define the contours of the face and the texture of the wig. The background is rendered with a dense, stippled texture, which creates a contrast against the lighter tones of the subject's cravat and face. Ireland's approach to the medium reflects the eighteenth-century interest in reproducing and disseminating the likenesses of historical figures through print media.

Samuel Ireland was active during the late eighteenth century and is remembered for his publications concerning the works of Hogarth and his own travels. This piece is a representative example of the printmaking practices of the era, where the engraver sought to translate the tonal qualities of an oil painting into the linear language of copperplate engraving. The work provides a clear visual record of Thornhill, capturing the formal attire and the dignified expression expected of a painter to the Crown. The print remains a useful reference for those interested in the history of British portraiture and the collaborative nature of eighteenth-century artistic production.