This is a biographical account (Janam Sakhi) of Guru Gobind Singh in old Punjabi script which is a mixture of Devnagri and Gurmukhi. Several myths, miracles and imaginative stories related to Guru's birth and life are found in this description. We find imaginative dialogue between the Guru and his followers about past, present and future of the Sikhs. Guru's commandments (Hukamnamas) too find their mention in it. Its reading evokes feelings of devotion and faith in the tenth Guru's spiritual and divine status. Modern readers are likely to raise doubts about some of the myths which contradict Sikh tenets and historical facts. Still this handwritten manuscript makes some contribution to Sikh heritage.