IMO H/H have been built as being compatible over the series while R/Hr are shown as volatile.

The southern route passed south, down the Wasatch Front, to Cedar City, Utah, where it joined the Old Spanish Trail and passed through Mountain Meadows in route to Los Angeles.

Gee, last time I wrote a quine in Lisp it ended up being kind of difficult...

The concurrence of all corroborates the same truth.