noon
`` Who taught you that ? '' asked Mr. Daggett sharply . `` Nobody ; I just thought of it . '' Two hours later , when the noon whistles blew , Bobby said good-bye to his friend after a most interesting morning . Mr. Daggett had showed him everything . He explained how in the type-cases the capital letters occupied little compartments all alike and at the top , but how the small letters were arranged arbitrarily in various-sized compartments . `` You see , '' said he , `` we use the _ e _ oftenest , so that is the largest and is right in the middle .