Convince the Elders to send help to Cathedral

Convince the Elders to send help to Cathedral is a side quest in the original Fallout.

Quick walkthrough

 * 1) Go to Mariposa Military Base and discover the mutants inside.
 * 2) Go to Cathedral, make the way into Morpheus' room and get Lieutenant's letter from computer.
 * 3) Return to Lost Hills and inform Elder Maxson of the danger.
 * 4) Convince the Elders to send Paladins.

Detailed walkthrough
Go to Mariposa Military Base and exit, then go to Cathedral, enter the hall, and move upstairs to the 4th floor. Deal with Morpheus and use Science skill on his computer. Then return to Brotherhood. Report to Maxson and convince them about danger from base, they will send assistance by your choice: to the base or to the Cathedral.

Rewards

 * 2 assisting Paladins at Cathedral.
 * 1500 XP