 Why did Callahan think Trillium was Berta when he first spotted her?
[Transcriber's Note: This etext was produced from Planet Stories Summer 1955. The intercom roared fit to blow O'Rielly back to Venus. At the first flash of red on the bank of meters Apprentice Burnerman O'Rielly had slammed the safety helmet on his head; he was already throwing open the lock to the burner room. O'Rielly wondered had Callahan passed out, was so long before the old Burner Chief demanded hoarsely, "Didn't you lock them controls before blast-off?" "If every control hadn't been locked in correct setting," O'Rielly answered from his own angry bewilderment, "the error would have registered before blast-off—wouldn't it, sir?" A dozen burners on this ship; why did something crazy have to happen to O'Rielly's? Not enough to cause serious trouble this far out from Earth. Sweat pouring off him, O'Rielly prowled around his burner. Anyone entered or left there, a bell clanged, lights flashed and a meter registered beside the Burnerman's bunk and on the Burner Chief's console up in the flight room full of beautifully efficient officers. Ever since Venus blast-off O'Rielly had been in Four's watch room. By now the Old Woman herself, Captain Millicent Hatwoody, had probably inquired what was in charge of Burner Four. Well, ma'am, O'Rielly searched every cranny where even a three-tailed mouse of Venus could have stowed away. His first flight, and O'Rielly saw himself washed out, busted to sweeper on the blast-off stands of some God-forsaken satellite. Oh, she was a female human, though, this creature at which O'Rielly stood gaping. This, mind you, he felt in an age where no Earth guy for a thousand years had dared raise so much as a breath against woman's supremacy in all matters. That male character trait, however, did not seem to be the overpowering reason why O'Rielly, instead of laying violent hands upon this one's person, heard himself saying in sympathetic outrage, "A shame you had to go to all that bother to get out here!" Yes, ma'am, O'Rielly was floating on a pink cloud with heavenly music in his head. Except on the Venus layover when he'd been roped into a dice game with a bunch of Venus lads who had a jug to cheer one's parting with one's money. "Higher than a swacked skunk's tail again," Callahan muttered, then snapped back over his shoulder, "Use your shower!"
 Because Berta was Trillium's Grandmamma and she resembled her from a hundred and twenty-five years ago.
 Because Berta was Trillium's Grandmamma and she resembled her from a hundred and twenty-five years ago.  Because she introduced herself as so and led him to believe that was who she was.  Because all the Venus women have the same enchanting appearance.  Because only Berta was able to enter the ship.