His most common works were small or miniature oval pastels in the style of the Irish painter Hugh Douglas Hamilton (c. 1740–1808), showing head and shoulders at 3/4 orientation, often viewed slightly from below.
Lewis I's gravestone records that he "bestowed great pains upon the teaching of the young through a period of 45 years".
[3] Lewis II commenced his career as a soldier, and was an ensign when stationed in Gibraltar.
In 1770 and 1771, then resident in York, and having obtained many clients from amongst the local gentry, he submitted miniature portraits for assessment and display at the Royal Academy in London.
[6] In 1787 he advertised his repertoire in the mediums of "oils, miniature, crayons &c." as including:[7] His surviving works include: Vaslet died in 1808, having written his will in 1806 (at Caroline Buildings in the parish of Lyncombe and Widcombe, Somerset).