Complex sentence: These compositions were not mentioned in Gilman's 1909 biography of MacDowel and were listed without opus numbers in the 1912 publication of MacDowell's "Critical and Historical Essays" and in the 1922 book "Edward MacDowell" by John F. Porte.
Split into simpler sentences: These compositions were not mentioned in Gilman's 1909 biography of MacDowell. They were listed without opus numbers in the 1912 publication of MacDowell's "Critical and Historical Essays" and in the 1922 book "Edward MacDowell" by John F. Porte.