According to William Reid's The Praise-Book: Being "Hymns of Praise." with Accompanying Tunes (1866), the tune HEREFORD (NEW) was "Composed expressly for this Work" by M. K. W. in 1865.  In the Preface she is acknowledged thus, "to our young friend, “M. K. W.,” (who modestly requests us not to publish her name) for the tunes composed by her for this work—".