Diesels 15 and 19 Tidbit

While researching material for the Friends web site rolling stock roster, I came across this from the Feb. 1994 C&TS Dispatch, written by Earl Knoob:
Diesel no. 15, which was leased from the Georgetown Loop Railroad this summer and spent the season in Antonito, was run light to Chama this fall and is serving as the Chama shop goat this winter. Diesel no. 19 was sent to Antonito for some prime mover work and to serve as the switcher.
Because the three new coaches needed some minor work, 19 hauled them over to Antonito in early November. Because the three coaches were over tonnage, 15 was the helper to Cumbres. It was the first time since the two locomotives left Hawaii in the 1960s that they had worked together on the same railroad, let alone the same train. Undoubtedly, it was the first time the two locomotives had ever double-headed in the snow! Also, the two engines celebrated their fiftieth birthdays last October.