Composer H. A. Callow (tune: SOLITUDE)

FYI
According to The Dictionary of Composers for the Church in Great Britain and Ireland (1997), composer H. A. Callow is more specifically Harriet Ann Smart Callow (October 20, 1817 - June 30, 1883), younger sister of composer Henry Thomas Smart (REGENT SQUARE, LANCASHIRE, etc.).

Also, according to Women Composers (1902) by Otto Ebel, Harriet Smart wrote "a number of hymns and other vocal music" so there are more to find (though they may not have appeared in American hymnbooks).