Unable to go to London tomorrow as he is suffering from one of his "old inflammatory attacks on the lungs", but hopes to be well enough to attend Linnean Society anniversary meeting by staying at Mr [Thomas] Forster's in Hackney, [Middlesex], for a week beforehand. [Thomas] Brightwell [(1787-1868), entomologist] will attend Society on Tuesday to be admitted, will bring [Joseph] Sabine's paper.