2 adverbs to describe how to unearthing

"Two separate and independent witnesses, cleverly unearthed by the police, had seen this same shabbily dressed individual stroll into the first-class waiting-room at about 6.15 on Wednesday, December the 10th, and go straight up to a gentleman in a heavy fur coat and cap, who had also just come into the room.

Presently he heard a cry, a panting, breathless cry, but full of a joy unspeakable: "I've got it!Oh, Uncle PorgesI've found it!" Small Porges was down upon his knees, pulling and tugging at a sack he had partially unearthed, and which, with Bellew's aid, he dragged forth into the moonlight.

2 adverbs to describe how to  unearthing  - Adverbs for  unearthing