— ‘My sister was growing old, and she was asserting her independence. My mother was jealous of her. We went to Digha (on vacation). My mother made her strip in the bathroom…

— ‘My mother thinks I am impotent. She wanted to see me develop a relationship. This is why she used to send a maid servant to my room…’

These lines were scribbled by Partha De in about 10 exercise books that he called his “autobiography”. Partha’s father, 77-year-old Arabindo De, burnt himself to death at his house in Kolkata’s Robinson Street, leading the police to the gory discovery on Thursday morning that Partha had been living with the skeleton of his sister and carcasses of his two pet dogs.

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The sexual overtone in several notes that the police found scattered all over the bungalow on Friday and the lurid description of bizarre sexual acts in Partha’s writings have led the cops to suspect a complex relationship among family members. Psychiatrists, however, advise caution and say that Partha may have written the notes in a state of delusion. They don’t rule out the possibility of incest or that Partha may have somehow been responsible for the death of his sister, but they’d rather wait a few weeks to assess his mental state to sift truth from hallucination.

In some of the jottings, it is clear that Partha had sensed his mother’s growing concern over his physical closeness with his elder sister and expressed his dislike for his mother, the police said.

Psychiatrist Sabyasachi Mitra who examined Partha at Pavlov Mental Hospital on Friday said the 44-year-old engineer may have necrophilia — a condition that triggers sexual attraction towards corpses. “Rather than what he has mentioned in his diaries, Partha De might have been in a physical relationship with the dead bodies he has been living with. It is not yet established, but such behavior is not unusual on the part of psychosis patients,” he told TOI. Investigators have decided to take the help of a psychiatrist when they question Partha in hospital on Saturday.

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Among the bizarre things police have noticed is that Partha, his father Arabindo De and sister Debjani conversed with each other through handwritten notes. There are just so many of them that the police are confused who wrote what to whom. Experts are being roped in to sort the writings and establish lines of ‘conversation’.

In one set of writings, someone wonders: “Ei pothei ki jibon cholar chilo? (Was this the way my life was to shape up?).” Another person replies that “God would save him”. A third person writes that the one who asked the question is “heading in the right direction”. Said an investigator: “We are yet to ascertain which family member fitted into which character. But it is certain that they spoke less and wrote to each other more.”

The ones accepted as Partha’s writings are a mixed pack of conflicting comments about his mother, graphic descriptions of sex and mysterious references to a maid.

In one, he writes “All men and women are dancing. Either to (the) tune or out of tune…” before going on to describe a physically explicit scene. Sometimes he eulogizes his mother and then speaks of how “jealous” she was of Debjani, who was three years older to him.

Sometimes Partha mixes up his mother with his grandmother and he talks endearingly of both on these occasions. He narrates how his mother fought against breast cancer till her death in 2007 and claims he could not attend his mother’s last rites. “The enemy tried to take my mother but failed. It lost — the biggest loser. The devil got (f*****) royally. My mother had a very powerful will. She fought with all her weight.”

Partha didn’t always finish one exercise book before picking up another. “Some had 20 pages filled, some 10 and some even five. While some described sexual acts in uncomfortable detail, others dwell on the state of the family,” said a source. Partha talks of unity in the family. “The best part of our family is that, in spirit, we are all 100 per cent, whatever we do is 100 percent. Trying to do what we know is right according to our conscience,” he writes.

Investigators have found several drawing books with “Partha De” inscribed on the cover. “Most of these drawings are of monkeys and dogs in different postures. It’s as if a Class 1 kid has drawn them. We have found hundreds of CDs relating to spiritual gurus from Bengal, Europe and US. We also found several comics — from Archies to Amar Chitra Katha and Mahabharat. Many of them had fresh labels of a bookstore on Lord Sinha Road,” said an officer.

Read this in Hindi: कोलकाता का भुतहा घरः पार्थ डे के बंगले की अजीबोगरीब 'सेक्स स्टोरी'