Very little is known about the profilist Steell. The scant information we have about him has been taken from advertisements. These simply tell us he visited Northampton twice in 1781. Unfortunately, Steell did not specify in these advertisements the techniques he used to create his profiles and no recorded pieces of work by Steell exist.
Source: McKechnie (Author of, British Silhouette Artists and their Work 1760-1860)
Steell (McKechnie Section 1)