“The utility archives on Third Street keep duplicate microfiche for three years,” Claire said.

“I paid thirty-four dollars for the certified records.”

“Did Thomas sign it with his own name?” Ruth asked.

“He signed the work order himself, under his residential framing company account,” Claire said.

Ruth looked down at the signature showing on the portable slide viewer.

“He listed it as a secondary intercom relay for a workshop.”

“It was no intercom,” Claire said.

“It was a manual cutoff switch that shut down the downstairs extension while keeping the upstairs line live to record.”