Part 71

But Halkett had a letter to write before he could start; and it was slow work, because the letter must be written in a cipher, the key to which was the solar spectrum and the three metallic symbols.

He had scarcely completed his letter when Sister Eila and Linette entered the hallway together.

The Sister of Charity caught sight of him through the doorway as he rose from his seat in the empty dining-room; and she instantly went to him.

He thanked Linette, closed the door, and turned to Sister Eila.

"There's nobody else I can trust," he said. "Will you help me?"

"You know I will."

He drew the two envelopes from his breast pocket and handed them to her in silence. Then he laid on the table the letter which he had just, written.

"I am obliged to go to Ausone," he said. "It will take me several hours, I suppose, to go, attend to my business, and return. Could you remain here at the inn until I can get back?"

"Yes. Sister Felicite is with the children."

"Then this is what you must know and prepare for. If, while I am away, a man should come here and ask for me, you will show him this letter lying on the table, and you will say to him that I left it here for a man whom I have been expecting. You will stand here and watch him while he is reading this letter. If he really can read it, then he will ask for pen and ink, and he will change the punctuation of what I have written on the envelope: 'Ibis, redibis non, morieris in bello.' As I have punctuated it, it means: 'Thou shalt go, thou shalt not return, thou shalt die in battle.'

"So if he can read what is inside the envelope, he will erase the comma after the word non, and insert a comma after the word redibis. And the translation will then read: 'Thou shalt go, thou shalt return, thou shalt not die in battle.' Is all this quite clear to you, Sister?"

"Perfectly."

"Then, if a man comes here and asks for me, and if you see that he really has understood the letter which is written in cipher, then, after he has repunctuated what I have written, give him the other two envelopes which I have entrusted to you.

"Will you do this for--France, Sister Eila?"

"Yes"--she lifted her grave young eyes--"for France."

Through the open dining-room window Sister Eila watched his departure, smiling her adieux as the two men turned toward her and uncovered.

Then she seated herself by the window sill and rested her cheek on her palm, gazing out at the blue sky with vague, enraptured eyes that saw a vision of beatitude perhaps, perhaps the glimmering aura of an earthly martyrdom, in the summer sunshine.

And possibly a vision less holy invaded her tranquil trance, for she suddenly straightened her young shoulders, picked up the crucifix at her girdle, and gazed upon it rather fixedly.

The color slowly cooled in her cheeks till they were as white as the spotless wimple that framed them in its snowy oval.

After a while rosary and crucifix fell between her relaxing hands, and she looked up at the blue foothills of the Vosges with bluer eyes.

The next moment she sprang to her feet, startled. Over the sparkling hills came sailing through the summer sky a gigantic bird--the most enormous winged creature she had ever beheld. A moment later the high clatter of the aeroplane became audible.

*CHAPTER XV*

Wheeling in spirals now above the river meadow, the great, man-made bird of prey turned and turned, hanging aloft in the sky like a giant hawk, sweeping in vast circles through the blinding blue, as though searching every clump and tussock in the fields below for some hidden enemy or victim.

Louder and louder came the rattling clatter from the sky, nearer swooped the great plane on wide-stretched wings, until, close to the earth, it seemed to sheer the very grass blades in the meadow, and the deafening racket of its engines echoed and reechoed, filling the world with outrageous and earsplitting noise.

Sister Eila had gone to the front door; Magda and Linette stood behind her. And they saw the aeroplane alight in the meadow and a hooded figure, masked in glass and leather, step out, turn its goblin head toward the inn, then start rapidly toward them across the fields.

He was a tall thin man, and as he crossed the highroad and came toward them, he lifted the glass and leather mask and drew it back above his closely-fitting hood.

When he saluted Sister Eila's habit, he came to a full halt and his heels clicked together. Then he spoke in French, pleasantly, perfectly:

"Mr. Halkett, if you please, Sister. Is he still residing here?"