I wonder which ones he means, and I wonder which hymns that would apply to today? Surely this doesn't include hymns which are "absolutely valueless and without merit" from a theological point of view!

Very interesting indeed are the dynamic indications which were not uncommon in hymnals of this and earlier periods.
It must have been inspiring to hear entire congregations following them - and, as they undoubtedly did, sing in SATB and a capella when indicated.
Note also the range - high E's are not uncommon.
How pitiful are the moans and groans of modern people that they cannot do such things.
What a deprived culture we have allowed to follow such forebears as our ancestors were.
Note also that this is a Catholic book for Catholics who COULD sing!

And, some very fine tunes, many of which we no longer hear!