dusted the chemical bottles with the green scarf!!!).
Watch the video clip.

Go to the shelves with bottles and use magnifier glass on them
(the closest
view). Use the fingerprint powder on the bottles. Examine them.
Pick the
alcohol bottle with the positive fingerprint. In your inventory
use the alcohol
bottle with the empty flask. Put the bottle back on the shelf
(Brent will not
exit the lab with this bottle in his pocket). In your inventory
use the apple
juice bottle on the flask.

Exit the lab. Go to the Museum. Go left and talk with the beggar.
Give him the flask containing alcohol and apple juice.
Pick the coins from his hat.
Go to the main screen in front of the Museum, and then go right to
the phone
boot. Use magnifier glass on the phone boot and click on the
phone. Click on
the phone book (one of them will allow you to do so after you get
the money
from the beggar). Use coins with phone (upper part). Talk to the
girl.
Exit the phone boot and return to Chriss║╞ lab (Scotland Yard).
He is back now, so talk to him. He will give you the name of the
girl you spoke
with on the phone.
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