Lords = Derivatives.
Leo derives its power from its Lord, Sun.
Cancer derives its power from its Lord, Moon.
Gemini and Virgo derive their power from their Lord, Mercury.
Taurus and Libra derive their power from their Lord, Venus.
Aries and Scorpio derive their power from their Lord, Mars.
Sagittarius and Pisces derive their power from their Lord, Jupiter.
Capricorn and Aquarius derive their power from their Lord, Saturn.
So looking for the House Lords involves looking for the planet that rules over that house.
Example:
Aries Ascendant with Mars in 11th House
So the Ascendant/1st House is ruled by Aries, so if u look above to Aries, his derivative Lord is Mars. So the 1st Lord is Mars.
So then you look for Mars, who in this example you find in the 11th House.
So the 1st Lord is in the 11th House.
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The Lords ruling each house:
Aries Ascendant
Mars – 1st, 8th
Venus – 2nd, 7th
Mercury – 3rd, 6th
Moon – 4th
Sun – 5th
Jupiter – 9th, 12th
Saturn – 10th, 11th
Taurus Ascendant
Venus – 1st, 6th
Mercury – 2nd, 5th
Moon – 3rd
Sun – 4th
Mars – 12th, 7th
Jupiter – 8th, 11th
Saturn – 9th, 10th
Gemini Ascendant
Mercury – 1st, 4th
Moon – 2nd
Sun – 3rd
Venus – 5th, 12th
Mars – 6th, 11th
Jupiter – 7th, 10th
Saturn – 8th, 9th
Cancer Ascendant
Moon – 1st
Sun – 2nd
Mercury – 3rd, 12th
Venus – 4th, 11th
Mars – 5th, 10th
Jupiter – 6th, 9th
Saturn – 7th, 8th
Leo Ascendant
Sun – 1st
Mercury – 2nd, 11th
Venus – 3rd, 10th
Mars – 4th, 9th
Jupiter – 5th, 8th
Saturn – 6th, 7th
Virgo Ascendant
Mercury – 1st, 10th
Venus – 2nd, 9th
Mars – 3rd, 8th
Jupiter – 4th, 7th
Saturn – 5th, 6th
Moon – 11th
Sun – 12th
Libra Ascendant
Venus – 1st, 8th
Mars – 2nd, 7th
Jupiter – 3rd, 6th
Saturn – 4th, 5th
Mercury – 9th, 12th
Moon – 10th
Sun – 11th
Scorpio Ascendant
Mars – 1st, 6th
Jupiter – 2nd, 5th
Saturn – 3rd, 4th
Venus – 12th, 7th
Mercury – 8th, 11th
Moon – 9th
Sun – 10th
Sagittarius Ascendant
Jupiter – 1st, 4th
Saturn – 2nd, 3rd
Mars – 5th, 12th
Venus – 6th, 11th
Mercury – 7th, 10th
Moon – 8th
Sun – 9th
Capricorn Ascendant
Saturn – 1st, 2nd
Jupiter – 3rd, 12th
Mars – 4th, 11th
Venus – 5th, 10th
Mercury – 6th, 9th
Moon – 7th
Sun – 8th
Aquarius Ascendant
Saturn – 1st, 12th
Jupiter – 2nd, 11th
Mars – 3rd, 10th
Venus – 4th, 9th
Mercury – 5th, 8th
Moon – 6th
Sun – 7th
Pisces Ascendant
Jupiter – 1st, 10th
Mars – 2nd, 9th
Venus – 3rd, 8th
Mercury – 4th, 7th
Moon – 5th
Sun – 6th
Saturn – 11th, 12th
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References
[youtube http://www.youtube.com/watch?v=VQy20hgee6Q&w=560&h=315]