In 1715 following the death of his father, Pearce became a pupil of his eminent architect cousin, it is therefore likely that Pearce would have had the opportunity to see first hand and study the plans and building of Blenheim Palace, where work, following the death of Queen Anne, had just restarted, and was midway through its fraught and frequently interrupted construction. It seems though, that at this age Pearce was still uncertain if he wanted an architectural career, as aged 17 he joined the army serving as a cornet in the dragoons under the command of a Colonel Morris.