Thus it happened that Kuczynski mentioned in some detail in his 1962 letters to de Bellard quite a number of Cuban caves he had explored .
It happens to be that both himself and Kuczynski were speleologists and had initiated a fair correspondence since June 1958 .
Thus it happened that Kuczynski mentioned in some detail in Kuczynski 's 1962 letters to de Bellard quite a number of Cuban caves he had explored .
It happens to be that both himself and Kuczynski were speleologists and had initiated a fair correspondence since June 1958 .