You say you would like to know if the Truehearts had children, I'm assuming you mean more children then just Francisca.
1880 census San Antonio, Bexar Co, TX:
Category: Name;Relationship to head of household; Marital Status; Gender; Race; Age; Birthplace; Occupation; Father's Birthplace; Mother's Birthplace.
J. L. TRUEHEARTSelfMMaleW64VALand Agent------
M. G. TRUEHEARTWifeMFemaleW49TXKeeping House------
John O. TRUEHEARTSonSMaleW24TXClerkVATX
F. O. TRUEHEARTDauSFemaleW18TXVATX
J. A. TRUEHEARTSonSMaleW13TXVATX
George W. TRUEHEARTSonSMaleW13TXVATX
J. R. DEWITTOtherSMaleW10TXClerkMDTX
1870 census Bexar Co, TX (I don't understand, where are the younger children?):
Trueheart, James, 54, b VA land $2,000 / personal blank
" Margaret, 40, b TX
" James L., 16, b TX
Ashley, Franklin, 16, b KY (Ashley family living next door)
1860 census Bexar Co, TX:
Trueheart, James L., 36, b VA - land $20,000/personal $5,000
" Margarita, 29, b TX
" John O., 4, b TX
" Edward, 1, b TX
Nieves, Francisco, b MX, laborer
Next door (maybe Margarita's family?)
de la Garza, Felipe, 53, b TX - land blank, personal $200
" (Aisidora ?), 40, b TX
" Antonia, 17, b TX
" (Tules ?), 14, b TX
" Bernaldino, 7, b TX
" Felipe, 6, b TX
" Juan, 3, b TX
Now, if you mean did the Canales have children, it looks like they must have gone to Mexico, daughter was born in Mexico.
1910 census Bexar Co, TX:
Canales, Mrs. Fannie, hd, 45, Md 21 yrs, 2 ch, 1 lvg, b TX, TX, TX
" Margaret, dau, 20, sgl, b MX, MX, TX
(Fannie shown as having own income and renting house.)
I don't see Antonio on censuses 1900 through 1930.MaybeFannie went back to Mexico?
On the 1870 census in Galveston Co, TX looks like brother of James -- John O. Trueheart, 67, b VA Surveyor, land 50,000 & family; and next door probably his son, Henry M. 28, b VA, Real Estate Ageent, land 60,000 & family.
1860 census Galveston Co, TX:
Truheart(sic), J. 57, b VA - ld $22,000/pers 20,000-Surveyer
" Ann, 55, b VA
" Henry, 28, b VA - Genl Agt
" Caroline, 15, b VA
" Mildred, 12, b VA
" Fanny, 10, b VA
With personal property valued at 20,000, I would guess he owned slaves, or a whole lot of cattle.You should be able to find this family on the 1850 census in VA.I don't have access to 1850 online.
Happy Hunting (^_^)