In 1900 ​ — about 21 years after the first Watch Tower was printed — ​ only 8,000 automobiles were registered in the entire United States, and there were just a few hundred miles of roads good enough to drive them on.
मिसाल के लिए, सबसे पहली प्रहरीदुर्ग की छपाई के सिर्फ करीब 21 साल बाद, यानी सन्‌ 1900 में, पूरे अमरीका में सिर्फ 8,000 गाड़ियाँ और गिनी - चुनी अच्छी सड़कें थीं ।