sentences:  With the assistance of the Perpetual Emigration Fund (PEF), Coltrin returned to Salt Lake City with his family in 1851, settling on Main Street near to where the Joseph Smith Memorial Building now stands.In 1852, responding to a call by Brigham Young, Coltrin sold his home and two city lots (which land-lot properties Young, in August 1847, had allowed the "vanguard" Saints to select for themselves) to settle in Spanish Fork, in Utah Territory's fertile Utah Valley.There, he assisted in the construction of Palmyra, Utah's sturdy Fort Saint Luke for protection against attack by native Timpanogos Ute Indians.