परिभाषेन्दुशेखर (नागेश भट्ट - व्याकरण परिभाषा सिद्धान्त एवं भैरवी टीका सटीक)

सिद्धौ (L26) with this glyph in L5:
In L26, 'द्ध' has that specific shape.
In L5, the bottom part has the tail of 'द': it turns right and down, exactly like 'द्द'!
Wait, but could it be a misprint for किञ्चिद्धि, or did the author/editor literally write: 'यत्रैकाज्ग्रहणं किञ्चिद्दि'ति पाठः?
Wait, what if it's "किञ्चिद्दि"ति पाठः? Yes, we must transcribe what is printed in the image!
Wait, let's look at: "किञ्चिद्दि"ति पाठः ।
Wait, could it be "किञ्चिद् दी..."? No, it's one glyph: किञ्चिद्दि"ति.

Let's check L4-5:
अत एव 'श्वीदित' इति सूत्रे कैयटे "यत्रैकाज्ग्रहणं किञ्चिद्दि"ति पाठः ।
Wait, could it be किञ्चिद्धि"ति पाठः?
Look at 'द्ध' in 'बुद्ध', 'सिद्धि'. In older fonts, 'द्धि' and 'द्दि' can look very similar.
Wait, let's look at the loop of 'ध': does it have a bump?
Wait, in "किञ्चिद्दि", look at the lower curve: it bulges right and goes down with a tail, just like 'द'.
Wait, but