Two sisters - a blonde and a brunette - inherit the family farm , but hit financial trouble . They need to buy a bull from the market so they can breed their own stock , but only have Â£600 . The brunette sets off , telling her sister she will send a telegram when it's time to collect her . The cheapest bull is Â£599 , so the brunette pays for it then goes to send the telegram . A telegram is Â£1 a word - so the brunette tells the operator ;"just send the word 'comfortable'" . The operator asks; "how is she ever going to know that you want her to pick you up!" So the brunette explains ; "my sister's blonde. It's a big word. She'll read it very slowly; Com-for-da-bull."