'-a department for , well , we have n't got a name for it yet , but for looking at clues and things like dead bodies , e.g. , how long they 've been dead , and to start with we 'll need an alchemist and possibly a ghoul provided they promise not to take anything home and eat it ; a special unit using dogs , which could be very useful , and lance-constable angua can deal with that since she can , um , be her own handler a lot of the time ; a request here from corporal nobbs that watchmen be allowed all the weapons they can carry , although i 'd be obliged if you said no to that ; a- ' lord vetinari waved a hand .