The elderly man, who had necessarily unmouthed the dagger to achieve this articulateness, smiled disarmingly.

He swore up and down that he hadn't taken the money.

https://archive.org/stream/journalofscience1631unse#page/378/mode/1up page 378 The paper read was on The Electric Light applied to Lighthouse Illumination, by Mr. J[ames] N[icholas] Douglass, M. Inst. C.E. The author showed the progress of lighthouse luminaries from wood and coal fires to the introduction of tallow candles, fatty oils, mineral oils, coal gas, and electricity. […] https://archive.org/stream/journalofscience1631unse#page/381/mode/1up page 381 on more frequent occasions, when the oil luminary would be visible at about eight miles and a-half, the electric light would be visible at the full range of 17 miles.

The muscularity in his forearm was visible as he flexed his fingers.