Kalocsay studied medicine and later became a surgeon and the chief infectious disease specialist at a major Budapest hospital.[which?]

In 1921 his first original collection of poems, Mondo kaj Koro (“World and heart”) was published.

A further decade passed before the appearance of his collection Streĉita Kordo (“A taut string”), which many Esperantists[which?]

In 1932, under the pseudonym Peter Peneter, he published Sekretaj Sonetoj (“Secret sonnets”), a book of erotic verse.

Much was written about Kalocsay by his literary executor Ada Csiszár, after whose death the estate passed to the Esperanto Museum of the Austrian National Library.