Peanuts by Charles Schulz for March 30, 1974
Transcript:
Sally and Charlie Brown sit at the table. Sally writes, "T's." Charlie Brown says, "Those are nice looking T's."<BR><BR> Sally holds up the paper and says, "Those aren't T's . . . Those are telephone poles . . . I'm drawing a picture depicting the change of the west."<BR><BR> Sally continues, "I'm going to show how the telephone poles led the great movement of people across the land!"<BR><BR> Sally smiles and says, "I was just kidding you . . . They're really T's!"<BR><BR>
I think they would have been telegraph poles during that time period.