Interesting data for the day of the lynching:

U.S. Naval Observatory
Astronomical Applications Department

Sun and Moon Data for One Day

The following information is provided for Blanco, Blanco County, Texas (longitude W98.4, latitude N30.1):

        Wednesday
       26 August 1885        Central Standard Time        

                        SUN
       Begin civil twilight       5:43 a.m.               
       Sunrise                    6:07 a.m.               
       Sun transit               12:35 p.m.               
       Sunset                     7:03 p.m.               
       End civil twilight         7:27 p.m.               

                        MOON
       Moonrise                   7:04 p.m. on preceding day
       Moon transit              12:57 a.m.               
       Moonset                    6:54 a.m.               
       Moonrise                   7:40 p.m.               
       Moonset                    7:49 a.m. on following day

Phase of the Moon on 26 August: waning gibbous with 99% of the Moon's visible disk illuminated.

Full Moon on 25 August 1885 at 11:25 a.m. Central Standard Time.