Defence of pencil

Easy it is to mock, and rashly to conclude another man is foolish. My investigations are by no means complete. I did not know that there was such a thing as graph paper. I intend to acquire some. I did not begin keeping a record until 2 days after the full moon had occurred, and so my graph is incomplete. This too I intend to rectify next month. I did not expect any other person to look at my notes. I can see nothing unusual in the use of a fish-topped pencil.