Draw Person's chart on a piece of white paper and starting with center, then Aries, Taurus ...till Pisces (use south or east Indian chart as north Indian does not have a central space for the devas ...no brahma sthana)Touch center say OMomTouch Aries say haMhaTaurus ...haaMhGemini ...hiMhiCancer ...hiiiMhLeo ...huMhuVirgo ...huuuMhLibra ..heMheScorpio ...haiMhaiSagittarius ...hoMhoCapricorn ...hauMhauAquarius ...haMhaPisces ...haHhaThen touch the picture of Lord Shiva (or shiva lingam) if you have one and sayhaMsaH amritavarchase svaahaa hasa amtavarcase svhThen pour a drop of water at the center of chartThen recite the mantra *om jum sah vaaaM veda-vyaasaaya namaH sah joom OM' ...1008 times || om ju sa v vedavysya nama sa ju om ||In fact just keep recting till you feel the calmness of the Rishi Vedavyasa who is an amsa avatara of Shiva sitting on blue lotusYou father should start to recover after that ..if not already