With sharp touches indicating the various Members of the Society the satire continues, telling how they see in the moon, through the telescope, marvellous things, and an appearance of an immense elephant; they agree that a record must be made, and during the discussion who is to write it, one of the servants peeping through the telescope discovers that a _mouse_ has got in between the two glasses! It, and a swarm of small flies, are the causes of the mysterious phenomena, the vast beast, the marching and countermarching armies which have been so learnedly explained![93] The Society does not seem to have paid much attention to the poet, and the experiments went on as usual. A different task was presently offered to Wren by the King. When he married Catharine of Portugal, he received Tangiers, Tripoli, and Bombay as part of her dowry. Tangiers was reckoned as a very important place to the English, whose sailors were still constantly harassed by the Moorish pirates, and the fortifications of the town were a pressing care. King Charles offered, through Matthew Wren, then Lord Clarendon's secretary, a commission to Christopher Wren, as one of the best geometricians in Europe, to survey and direct the works at the mole, harbour, and fortifications of Tangiers, offering him an ample salary, leave of absence from his Professorship, and a reversionary grant of Sir John Denham's office. Flattering though the offer was, Christopher declined it on the ground of his health, and begged the King to command his duty in England. [_A WARM FRIEND._] He no doubt judged wisely, and the refusal gave no offence at Court. Perhaps the leave of absence might not have been easily obtained, for the following letter from Dr. Sprat shows that Wren was already embarrassed by the difficulty of being in two places at once:--