सङ्गीतदर्पण (दामोदर पण्डित - तंजौर सरस्वती महल संस्करण, सङ्गीत एवं नाट्य लक्षण)

"? "लो द्रुश्च"?
Look at line 18:
"लोद्रुतौ प्रतिताळः स्यात्"
Here "लो" = Laghu (लः -> लो).
And "द्रुतौ" = two drutas.
In line 12:
"लो द्रुश्च" -> Laghu and druta!
Wait, but is the first letter 'लो' or 'लौ'?
Look at the top of 'ल': it has TWO slant strokes: "लौ"!
And the next letter: is it 'दश्च'?
Wait, the letter is:
द with subscript something... wait, could it be 'दश्च'? Yes, literally printed as 'लौदश्च' or 'लौदृश्च'!
Wait, look at the printer's typeset:
Sometimes typesetters use a broken or wrong sort.
It looks like: ल + औ + द + श्च -> "लौदश्च".
Wait, let's look at the bottom of 'द':
There is a small hook, like 'द' in Devanagari types of Nirnaya Sagar Press.
Wait, in NSP fonts, 'द' has a small tail at the bottom: 'द'.
Next to it is 'श्च'.
So it is simply: लौदश्च!

Let's check line 16:
"लघुर्द्रुतद्वयं लघ्व यतिताळः प्रकीर्तितः ।"
Wait, is there a visarga or something after ल