But the fifth baronet of the same familiar name will demand somewhat more of our time and attention. He was the son of the last-mentioned Sir John St. Aubyn, was born on the 17th May, 1758, and was educated at Westminster; where, when a lad of seventeen, he had an amusing escapade. He and another hopeful young gentleman, his schoolfellow, joined in a bond for raising money to enable them to obtain the delights and luxuries which the discipline of the school and the extent of their pocket-money denied. The inevitable day came for repayment of the moneys advanced. It was in vain that 'infancy' was pleaded against the suit of the London money-lender; the precocious financier was ordered to pay back the sums he had borrowed, and interest at four per cent. A lad of so much enterprise was evidently designed to make some figure in the world, and we accordingly find him, when only twenty-six years old, contesting the county in 1784. He made another unsuccessful attempt six years afterwards; but, nothing daunted, once more essayed to obtain a seat in Parliament, and on this occasion succeeded in securing his election for Penryn. He afterwards sat for Helston from 1807 to 1812. But it does not appear that he took any very prominent part in political life, his tastes leading him rather to the pursuit of the arts and sciences; and accordingly we find that he was elected a Fellow of the Royal Society, of the Society of Antiquaries, and of the Linnæan Society. In 1804, in conjunction with others, he proposed to establish, at the Royal Institution, at a cost of £4,000, a mineralogical collection and an Assay Office, on a large scale, for the improvement of the study of mineralogy and metallurgy; but the scheme failed for want of funds, although Sir Humphry Davy, Lord Dartmouth, and one or two more took great interest in the matter, and contributed valuable collections of minerals, etc. Here it may be mentioned that Dr. Wm. Babington dedicated to Sir John[140] his 'New System of Mineralogy.' It was, in fact, a catalogue of the Baronet's own collection, much of which had previously belonged to the Earl of Bute.