Large blocks of ice were cut from Winter Harbor as well. I don't know the method of cutting, but I suspect that a single long steel wood-cutting blade was operated by hand. Chainsaws were still new, and as heavy as the outboards of the time.
The blocks were then pulled uphill by horse and chain, and stacked intact under canvas and piles of wet sawdust. It was to be another four months before put to use.
As a youngster, I might have asked why my glass of iced tea had sawdust pieces at the bottom.