tenderness is due even to a superstition, which thus originates in piety and benevolence." These sentences, extracted from the reverend Mr. Strahan's preface, if they are not a full justification, are, at least, a beautiful apology. It will not be improper to add what Johnson himself has said on the subject. Being asked by Mr. Boswell[p], what he thought of purgatory, as believed by the Roman catholicks? his answer was, "It is a very harmless doctrine. They are of opinion, that the generality of mankind are neither so obstinately wicked, as to deserve everlasting punishment; nor so good as to merit being admitted into the society of blessed spirits; and, therefore, that God is graciously pleased to allow a middle state, where they may be purified by certain degrees of suffering. You see there is nothing unreasonable in this; and if it be once established, that there are souls in purgatory, it is as proper to pray for them, as for our brethren of mankind, who are yet in this life." This was Dr. Johnson's guess into futurity; and to guess is the utmost that man can do: "Shadows, clouds, and darkness, rest upon it." Mrs. Johnson left a daughter, Lucy Porter, by her first husband. She had contracted a friendship with Mrs. Anne Williams, the daughter of Zachary Williams, a physician of eminence in South Wales, who had devoted more than thirty years of a long life to the study of the longitude, and was thought to have made great advances towards that important discovery. His letters to lord Halifax, and the lords of the admiralty, partly corrected and partly written by Dr. Johnson, are still extant in the hands of Mr. Nichols[q]. We there find Dr. Williams, in the eighty-third year of his age, stating, that he had prepared an instrument, which might be called an epitome or miniature of the terraqueous globe, showing, with the assistance of tables, constructed by himself, the variations of the magnetic needle, and ascertaining the longitude, for the safety of navigation. It appears that this scheme had been referred to sir Isaac Newton; but that great philosopher excusing himself on account of his advanced age, all applications were useless, till 1751, when the subject was referred, by order of lord Anson, to Dr. Bradley, the celebrated professor of astronomy. His report was unfavourable[r], though it allows that a considerable progress had been made. Dr. Williams, after all his labour and expense, died in a short time after, a melancholy instance of unrewarded merit. His daughter possessed uncommon talents, and, though blind, had an alacrity of mind that made her conversation agreeable, and even desirable. To relieve and appease melancholy reflexions, Johnson took her home to his house in Gough square. In 1755, Garrick gave her a benefit play, which produced two hundred pounds. In 1766, she published, by subscription, a quarto volume of miscellanies, and increased her little stock to three hundred pounds.