Date (happened)
c. 1970
(probable)
passage 553393 (lecture nid 2121), 'It tried to burn it last year, then tried to flood it out, and then tried now to wind it out, and then to shake it out'
Told / reported
c. 1971
(probable)
d1/d2 delivery claims on lecture nid 2121, corroborated by the earthquake reference in passage 553393