The words are unattributed. To me the hymn seem like a hymn from an earlier era and unlikely to be written by Parks. Nevertheless, I have yet to find it elsewhere, other than the first stanza used by W. A. Cumbie as a second stanza to his song Come and Go with Me to Heaven in 1902.
The Birman Hymn
1. O, seek ye heaven--a golden land,
Where happy souls rejoicing stand,
And ever view the Saviour's face,
And speak and sing of matchless grace.
2. Exempt from sin and sorrow's rage,
From sickness, death, and wasting age;
All suff'ring banish'd from the place,
They speak, and sing of matchless grace!
3. Love fills entire each burning breast,
Of everlasting bliss possess'd;
They quaff with joy th' immortal spring,
Of grace divine they speak and sing.
4. God's presence is their dwelling-place!
The glorious and effulgent rays
From Jesus' face around them shine,--
They speak, and sing of grace divine!
[UPDATE: Wade Kotter found The Birman (Burman) Hymn in Simple rhymes and familiar conversations for children by Charles D. Mallary. Thanks, Wade!!]
[UPDATE 2: I believe the W. W. Parks in the organization of the Auburn Methodist Church in 1892 is the son rather than the father. It appears that the father had already moved to Flowery Branch before that time.]