I found a link which suggests the hut was repaired by a mason who worked for the USFS during summers for 50 yrs (third paragraph). The syntax makes it appear that the writing was that of a school age girl.
http://www.qsl.net/wb6ufx/HaleyFam1.htmlThe hut was in great disrepair in 1956. No roof, floor not level enough to sleep on due perhaps to parts of the walls falling inwards, etc. Then it was rededicated in the 70's. So it was more or less rebuilt or refurbished probably in late 50's to 70's. I was just curious.