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A separate line led, apparently, to the den, and where this line
feeding the Osram lamp passed near a dark storeroom in a corner
Craig examined more closely than ever. Seemingly his search was
rewarded, for he dived into the dark storeroom and commenced
lighting matches furiously to discover what was there.
"Look, Walter," he exclaimed, holding a match so that I could see
what he had unearthed. There, in a corner concealed by an old
chest of drawers, stood a battery of five storage-cells connected
with an instrument that looked very much like a telephone
transmitter, a rheostat, and a small transformer coil.
"I suppose this is a direct-current lighting circuit," he
remarked, thoughtfully regarding his find. "I think I know what
this is, all right. Any amateur could do it, with a little
knowledge of electricity and a source of direct current. The thing
is easily constructed, the materials are common, and a wonderfully
complicated result can be obtained. What's this?"
He had continued to poke about in the darkness as he was speaking.


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