Complex sentence: This was built in the 1740s under the supervision of Major William Caulfeild and a stone inscribed "Rest & Be Thankful" was erected around 1749, after this section road was completed.
Split into simpler sentences: This was built in the 1740s under the supervision of Major William Caulfeild. A stone inscribed "Rest & Be Thankful" was erected around 1749, after this section of road was completed.