Banneker kept a series of journals that contained his notebooks for astronomical observations, his diary and accounts of his dreams. The journals, only one of which escaped a fire on the day of his funeral, additionally contained a number of mathematical calculations and puzzles. The surviving journal described in April 1800 his recollections of the 1749, 1766 and 1783 emergences of Brood X of the seventeen-year periodical cicada, Magicicada septendecim, and stated that ".... they may be expected again in the year 1800, which is Seventeen years since their third appearance to me." The journal also recorded Banneker's observations on the hives and behavior of honey bees.