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These three are spoken of first, then the Hora a division of a sign into two halves (15° each) and the Drekkana a division of a sign into three parts (10° each) are described. Its third part is the Drekkana, and the ninth part is the Navamsha the most important sub-chart, dividing a sign into nine parts of 3°20'. O Great Goddess, the twelfth part is known as the Dwadashamsha a division of 2°30'. The Trishamsha a division of a sign into 30 degrees, though often used to refer to specific degree-stints assigned to planets is perfected as the last division. One should calculate the Hora and Drekkana according to their own measures and forms, as stated here. One should attain those divisions through the portions of the signs, their respective positions, and the lords of the houses. The results of the lords of the Hora and other divisions are as follows: In the "odd" signs, O Goddess, the first Hora belongs to the Sun original: "Indurochishah," literally 'light-bringer' and the second to the Moon. In the "even" signs, it is said to be the reverse. The lords of the first, fifth, and ninth signs are always said to be the lords of the Drekkanas for all signs, O Parvati. Now listen to the calculation of the Navamshas for Aries and the others, divided properly: For Aries, Leo, and Sagittarius, the Navamshas begin with Aries. For Taurus, Virgo, and Capricorn, they are known to begin with Capricorn. For Gemini, Libra, and Aquarius, the Navamshas begin with Libra. For Cancer, Scorpio, and Pisces, the Navamshas begin with Cancer. O Goddess, the Vargottama literally "best division"; refers to a planet occupying the same sign in both the main chart and the Navamsha sub-chart is known as such when the Navamsha matches the sign. This is a giver of auspicious results. For all signs, the Dwadashamshas are calculated starting from the sign itself. In Aries and Taurus... text becomes fragmented regarding specific degree assignments five, five, eight...
Na Ha 68
Aries 5, Taurus 1 joined with the portions 7 and 7
The Ascendant, the Fourth house original: "Patala", the Seventh house original: "Jamitra", and the Tenth house—place these in the thirty divisions. One's own body is the Hora, the Drekkanas are one's own land. The Navamshas are with their own directions. The Dwadashamshas and Trishamshas are known by their own essences. Having established the planets and the lunar mansions original: "Nakshatra", one should divide them by the power of the Lord...
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