On 24 December 1767 Richard Potenger, Fellow of King’s College, Cambridge, and lately Under-Secretary of State, wrote to the Provost of King’s, John Sumner, as follows:
You will please to recollect, that at our last meeting, when the affair of the new altar to be built in our Chapel was under consideration, I took the liberty of mentioning Mr Adams as the architect, in my opinion, most proper to be employed for drawing the plan. I have therefore, in consequence of your permission and in concert with Dr Baker, talked with Mr Adams upon the subject, whom I find very ready and well-pleased to undertake the plan, which, I dare say, he will do with taste, and in a manner suitable to the grandeur of our Chapel.
Adam was by no means the first architect considered or approached to design a new altar-piece for King’s College Chapel. Almost a decade earlier, in late 1758 or early 1759, Sir James Burrough was consulted by the College and in consequence submitted two plans, both of which, ‘as it was to be a work of public view and of lasting use, Mr Upton, as was thought advisable, took with him to London for the opinion of those who might be competent judges in such a matter’. The judgement was not very favourable; all those consulted emphatically agreed that the altar must be gothic. ‘Mr Stewart particularly is of this opinion, which I mention the rather as he is well known to disapprove entirely of the present fashionable taste for Gothic architecture.’ From this remark it would appear that the ‘Mr Stewart’ consulted was in fact ‘Athenian’ Stuart, at that time back in England preparing his Antiquities of Athens for publication. In accordance with the advice, the College approached another architect, James Essex. Essex had at that time been working with Burrough and ‘the Provost was lately informed that it was probable Mr Essex had assisted Sir James in drawing this plan, and upon enquiring of Mr Essex he finds that Mr Essex was the person who actually drew the plan under the direction of Sir James’.