The first floor of the lab looks exactly like the Karrnathi undead research facility on page 40 of Magic of Eberron, except that the undead storage room is instead an undead testing room, and has ramps to the second floor, where the undead storage chambers are.  The second level also has laboratories in about a 150 foot by 150 foot area west of the undead storage rooms.<br/><br/>The undead storage rooms themselves are 3 130 foot by 50 foot chambers each rated to hold 192 medium undead.  The facility was 75% at capacity before Omik released all the undead.  He took 12 members of his staff with him, and the other 35 individuals at the facility are presumed dead.<br/><br/>At any rate, a letter is perfectly fine.  Ith'ika can currently draw upon about 75 soldiers to run errands in Rekkenmark, and the seals on the mine are holding.  Transit time from Rekkenmark to Irontown by lightning rail is 48 hours, which would leave 1 week to reach Sharn and head off Omik, if you spent 1 day recuperating.  Preparing a plane shift spell could be done beforehand and taken with the party on the way to Irontown to save a return trip, buying another 48 hours.