From 1776 to 1809 Mrs. Piozzi kept a copious diary and note-book, called "Thraliana." Johnson thus alludes to it in a letter of September 6th, 1777: "As you have little to do, I suppose you are pretty diligent at the 'Thraliana;' and a very curious collection posterity will find it. Do not remit the practice of writing down occurrences as they arise, of whatever kind, and be very punctual in annexing the dates. Chronology, you know, is the eye of history. Do not omit painful casualties or unpleasing passages; they make the variegation of existence; and there are many passages of which I will not promise, with AEneas, _et haec olim meminisse juvabit_." "Thraliana," which at one time she thought of burning, is now in the possession of Mr. Salusbury, who deems it of too private and delicate a character to be submitted to strangers, but has kindly supplied me with some curious passages and much valuable information extracted from it. I shall have many minor obligations to acknowledge as I proceed. Unless Mrs. Piozzi's character and social position are freshly remembered, her reminiscences and literary remains will lose much of their interest and utility. It has therefore been thought advisable to recapitulate, by way of introduction, what has been ascertained from other sources concerning her; especially during her intimacy with Johnson, which lasted nearly twenty years, and exercised a marked influence on his tone of mind. "This year (1765)," says Boswell, "was distinguished by his (Johnson) being introduced into the family of Mr. Thrale, one of the most eminent brewers in England, and member of Parliament for the borough of Southwark.... Johnson used to give this account of the rise of Mr. Thrale's father: 'He worked at six shillings a week for twenty years in the great brewery, which afterwards was his own. The proprietor of it had an only daughter, who was married to a nobleman. It was not fit that a peer should continue the business. On the old man's death, therefore, the brewery was to be sold. To find a purchaser for so large a property was a difficult matter; and after some time, it was suggested that it would be advisable to treat with Thrale, a sensible, active, honest man, who had been employed in the house, and to transfer the whole to him for thirty thousand pounds, security being taken upon the property. This was accordingly settled. In eleven years Thrale paid the purchase money. He acquired a large fortune, and lived to be a member of Parliament for Southwark. But what was most remarkable was the liberality with which he used his riches. He gave his son and daughters the best education. The esteem which his good conduct procured him from the nobleman who had married his master's daughter made him be treated with much attention; and his son, both at school and at the University of Oxford, associated with young men of the first rank. His allowance from his father,