Tl;dr--bloke climbs previously cracked ice column in March, as he reckons it's his last chance to do something like this that year; is worried about the condition of the ice all the way up; wants to set a last 'ice device' ("Eisgerät", probably some kind of hook) to climb over an overhanging 'ice balcony'; column ruptures; he miraculously survives almost uninjured except for a few bruises. Bloke publishes guide to ice climbing called 'Hot Ice'.
Tl;dr--bloke climbs previously cracked ice column in March, as he reckons it's his last chance to do something like this that year; is worried about the condition of the ice all the way up; wants to set a last 'ice device' ("Eisgerät", probably some kind of hook) to climb over an overhanging 'ice balcony'; column ruptures; he miraculously survives almost uninjured except for a few bruises. Bloke publishes guide to ice climbing called 'Hot Ice'.