This month Ridley Scott worked on storyboards, three and a half weeks after his visit around Christmas to Hollywood for Alien before returning there for a meeting that would increase his budget
Friday, January 20th 1978
Around this time, Scott met first with Walter Hill and David Giler at Fox (page 74. Making of Alien, JW Rinzler) See: Ridley arrives in Hollywood
Wednesday, January 25th 1978.
In a memo, it's written that Ridley had been engaged as Director of "The Alien" on a pay-or-play basis (page 75. Making of Alien, JW Rinzler)